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A certain toll station on a highway has 7 tollbooths, and each tollboo

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Re: A certain toll station on a highway has 7 tollbooths, and each tollboo [#permalink]
Bunuel wrote:
A certain toll station on a highway has 7 tollbooths, and each tollbooth collects $0.75 from each vehicle that passes it. From 6 o'clock yesterday morning to 12 o'clock midnight, vehicles passed each of the tollbooths at the average rate of 4 vehicles per minute. Approximately how much money did the toll station collect during that time period? A.$1,500
B. $3,000 C.$11,500
D. $23,000 E.$30,000

NEW question from GMAT® Quantitative Review 2019

(PS01443)

OA:D
Total hours: $$18 hours$$
Total Vehicles passed per toll booth per hour : $$4*60 =240$$
Toll collected per vehicle :$$0.75$$
Number of Toll booths:$$7$$
Total money collected = Total hours * Total Vehicles passed per toll booth per hour *Toll collected per vehicle *Number of Tollbooths
= $$18*240*0.75*7=22680$$
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Re: A certain toll station on a highway has 7 tollbooths, and each tollboo [#permalink]
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Bunuel wrote:
A certain toll station on a highway has 7 tollbooths, and each tollbooth collects $0.75 from each vehicle that passes it. From 6 o'clock yesterday morning to 12 o'clock midnight, vehicles passed each of the tollbooths at the average rate of 4 vehicles per minute. Approximately how much money did the toll station collect during that time period? A.$1,500
B. $3,000 C.$11,500
D. $23,000 E.$30,000

We can create the expression:

7 tollbooths x $0.75 per vehicle x 4 vehicles per minute x 60 minutes x 18 hours =$22,680 ≈ $23,000 Answer: D Senior Manager Joined: 19 Oct 2013 Posts: 411 Own Kudos [?]: 312 [4] Given Kudos: 117 Location: Kuwait GPA: 3.2 WE:Engineering (Real Estate) Re: A certain toll station on a highway has 7 tollbooths, and each tollboo [#permalink] 4 Kudos Bunuel wrote: A certain toll station on a highway has 7 tollbooths, and each tollbooth collects$0.75 from each vehicle that passes it. From 6 o'clock yesterday morning to 12 o'clock midnight, vehicles passed each of the tollbooths at the average rate of 4 vehicles per minute. Approximately how much money did the toll station collect during that time period?

A. $1,500 B.$3,000
C. $11,500 D.$23,000
E. $30,000 NEW question from GMAT® Quantitative Review 2019 (PS01443) 6AM to 6PM = 12 hours then another 6 hours to midnight total 18 hours. 18 * 60 = 1,080 minutes * 4 cars = 4,320 cars passing. Since the cost each car is 0.75 which equals 3/4 so 3/4 * 4,320 = 3 * 1,080 * 7(for the tollbooths) = 21 * 1,080 No need to go through tedious calculations 20 * 1,000 = 20,000 there is only one answer with such thousands digit. Answer choice D Manager Joined: 09 Jun 2014 Posts: 225 Own Kudos [?]: 284 [0] Given Kudos: 205 Location: India Concentration: General Management, Operations Re: A certain toll station on a highway has 7 tollbooths, and each tollboo [#permalink] I got confused with the wording here "From 6 o'clock yesterday morning to 12 o'clock midnight" Does that mean yesterdays midnight or it can mean even today's midnight. Senior Manager Joined: 14 Jul 2019 Status:Student Posts: 475 Own Kudos [?]: 372 [0] Given Kudos: 52 Location: United States Concentration: Accounting, Finance GMAT 1: 650 Q45 V35 GPA: 3.9 WE:Education (Accounting) Re: A certain toll station on a highway has 7 tollbooths, and each tollboo [#permalink] Bunuel wrote: A certain toll station on a highway has 7 tollbooths, and each tollbooth collects$0.75 from each vehicle that passes it. From 6 o'clock yesterday morning to 12 o'clock midnight, vehicles passed each of the tollbooths at the average rate of 4 vehicles per minute. Approximately how much money did the toll station collect during that time period?

A. $1,500 B.$3,000
C. $11,500 D.$23,000
E. $30,000 NEW question from GMAT® Quantitative Review 2019 (PS01443) 18 hours = 18 * 60 minutes 4 vehicles per minute = 18 * 60 * 4 total 7 toolbooths = 18 * 60 * 4 * 7 0.75 = 3/4$
Total collection = 18 * 60 * 7 * 3 = 1080 * 21 = 21600 + 1080 = 22680

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Re: A certain toll station on a highway has 7 tollbooths, and each tollboo [#permalink]
Top Contributor
Bunuel wrote:
A certain toll station on a highway has 7 tollbooths, and each tollbooth collects $0.75 from each vehicle that passes it. From 6 o'clock yesterday morning to 12 o'clock midnight, vehicles passed each of the tollbooths at the average rate of 4 vehicles per minute. Approximately how much money did the toll station collect during that time period? A.$1,500
B. $3,000 C.$11,500
D. $23,000 E.$30,000

NEW question from GMAT® Quantitative Review 2019

(PS01443)

Remember you need to calculate approximate value:
From 6 o'clock yesterday morning to 12 o'clock midnight = 18 hours
m\frac{75}{100}m*18*60*4*7
=3*18*60*7
=3*20*60*7
=60*60*7
=3600*7
=25200 [value less than 25,200]
Ans. D; 23000
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Re: A certain toll station on a highway has 7 tollbooths, and each tollboo [#permalink]
Hi Experts,
What is this question testing other than word translation skills? Is it testing how we can do tedious multiplication under 2 mins? Thanks!!
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Re: A certain toll station on a highway has 7 tollbooths, and each tollboo [#permalink]
Bunuel wrote:
A certain toll station on a highway has 7 tollbooths, and each tollbooth collects $0.75 from each vehicle that passes it. From 6 o'clock yesterday morning to 12 o'clock midnight, vehicles passed each of the tollbooths at the average rate of 4 vehicles per minute. Approximately how much money did the toll station collect during that time period? A.$1,500
B. $3,000 C.$11,500
D. $23,000 E.$30,000

NEW question from GMAT® Quantitative Review 2019

(PS01443)

why is it 18 hours from 6 to 12, from 6 to 12 means 6 and 12 both are included so it should be 19 hours.

where am I wrong?

There is a similar question in one of the threads " tickets being sold to a group of 30 every 5 minutes FROM 9 am to 5:55 pm and there we have counted 9 and 5:55 both for calculating the 5 minute interval".

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Re: A certain toll station on a highway has 7 tollbooths, and each tollboo [#permalink]
Convert 0.75 into 3/4.

7*18*60*4*3/4

Keeping Rounding off the answer as the answers have significant value differences.

7*20*60*4*3/4

7*20*60*3

21*20*60 = almost = 20*20*60 = 24000

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Re: A certain toll station on a highway has 7 tollbooths, and each tollboo [#permalink]
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Mck2023 wrote:
Hi Experts,
What is this question testing other than word translation skills? Is it testing how we can do tedious multiplication under 2 mins? Thanks!!

It's testing whether you can spot that you don't need to do the tedious multiplication at all, so it should take you less than ONE minute!!

Our total timespan is 18 hours and there are 60 minutes per hour. 18 and 60 are annoying. Ballpark!! Do ~20x50. That's ~1000 minutes.

Each toll booth averages 4 cars per minute at collects $0.75 per car. That's an average of$3/minute.

There are 7 toll booths.

~1000*3*7 = ~21000

Now look at the answer choices. Only one of them is close.

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Re: A certain toll station on a highway has 7 tollbooths, and each tollboo [#permalink]
Bunuel wrote:
A certain toll station on a highway has 7 tollbooths, and each tollbooth collects $0.75 from each vehicle that passes it. From 6 o'clock yesterday morning to 12 o'clock midnight, vehicles passed each of the tollbooths at the average rate of 4 vehicles per minute. Approximately how much money did the toll station collect during that time period? A.$1,500
B. $3,000 C.$11,500
D. $23,000 E.$30,000

NEW question from GMAT® Quantitative Review 2019

(PS01443)

Mck2023 wrote:
Hi Experts,
What is this question testing other than word translation skills? Is it testing how we can do tedious multiplication under 2 mins? Thanks!!

It's testing whether you can spot that you don't need to do the tedious multiplication at all, so it should take you less than ONE minute!!

Our total timespan is 18 hours and there are 60 minutes per hour. 18 and 60 are annoying. Ballpark!! Do ~20x50. That's ~1000 minutes.

Each toll booth averages 4 cars per minute at collects $0.75 per car. That's an average of$3/minute.

There are 7 toll booths.

~1000*3*7 = ~21000

Now look at the answer choices. Only one of them is close.

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Re: A certain toll station on a highway has 7 tollbooths, and each tollboo [#permalink]
daffy8 wrote:
Bunuel wrote:
A certain toll station on a highway has 7 tollbooths, and each tollbooth collects $0.75 from each vehicle that passes it. From 6 o'clock yesterday morning to 12 o'clock midnight, vehicles passed each of the tollbooths at the average rate of 4 vehicles per minute. Approximately how much money did the toll station collect during that time period? A.$1,500
B. $3,000 C.$11,500
D. $23,000 E.$30,000

NEW question from GMAT® Quantitative Review 2019

(PS01443)

why is it 18 hours from 6 to 12, from 6 to 12 means 6 and 12 both are included so it should be 19 hours.

where am I wrong?

There is a similar question in one of the threads " tickets being sold to a group of 30 every 5 minutes FROM 9 am to 5:55 pm and there we have counted 9 and 5:55 both for calculating the 5 minute interval".

Let's look at a simpler example. How many hours are there between 3pm and 5pm?

5 - 3 = 2 hours

On this problem, midnight is the equivalent of 24:00.

So, we subtract: 24 - 6 = 18 hours.

Or, another way to look at it: it's a full 24-hour day, minus the 6 hours before 6am.

On the tickets problem you're referring to, it's counting the number of times we sell tickets, which are spaced out in 5 minute intervals. This is different, and invokes the +1 concept that you're thinking about, when we're counting the number of values in an evenly spaced set.

Suppose we are asked how much time passed between 9:00am and 9:10am: we simply subtract, and get 10 minutes.

However, if we're asked how many times we sell tickets, if they're sold every 5 minutes from 9:00am to 9:10am, inclusive, then there's still a 10-minute period, with TWO 5-minute breaks between sales, but we have sold tickets THREE times: 9:00, 9:05, and 9:10. The difference here is that we need to count the sales at each endpoint. Alternatively, if we are asked for a time interval, we can just subtract the start time from the end time.
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Re: A certain toll station on a highway has 7 tollbooths, and each tollboo [#permalink]
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We can do this quickly if we notice a few things:
• "From 6 o'clock yesterday morning to 12 o'clock midnight" is 18 hours
• When we see "4 vehicles per minute", we need to convert hours to minutes, by multiplying by 60
• The question asks for units in $. If we multiply, all the other units cancel and we get$.
(7 tollbooths * 3/4 \$/vehicle * 18 hours * 60 min/hour * 4 vehicles/min)

For the calculation, it's helpful to:
• cross off the 4 on the bottom and top right away
• 7*3 rounds to 20
• 18 rounds to 20

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Re: A certain toll station on a highway has 7 tollbooths, and each tollboo [#permalink]