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# Someone on a skateboard is traveling 12 miles per hour. How many feet

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Math Expert
Joined: 02 Sep 2009
Posts: 46207
Someone on a skateboard is traveling 12 miles per hour. How many feet [#permalink]

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11 Mar 2015, 04:58
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Difficulty:

5% (low)

Question Stats:

89% (01:21) correct 11% (01:14) wrong based on 168 sessions

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Someone on a skateboard is traveling 12 miles per hour. How many feet does she travel in 10 seconds? (1 mile = 5280 feet)

A. 60
B. 88
C. 120
D. 176
E. 264

Kudos for a correct solution.

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Re: Someone on a skateboard is traveling 12 miles per hour. How many feet [#permalink]

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11 Mar 2015, 06:31
1
Hi

1 hr = 60*60 sec 3600 sec

In 3600 sec travels = 12 miles

In 10 sec travels = [12/3600]*10 = 1/30 miles

Now 1/30 miles =[ 1/30 * 5280 ] feet = 176 feet
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Re: Someone on a skateboard is traveling 12 miles per hour. How many feet [#permalink]

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12 Mar 2015, 09:51
1
12 miles per hour=1/5 miles per minute=5280/5 feet per minute= 5280/300 feet per sec

D=Rate x Time

D= 5280/300 x 10= 176 feet
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Re: Someone on a skateboard is traveling 12 miles per hour. How many feet [#permalink]

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12 Mar 2015, 11:39
Bunuel wrote:
Someone on a skateboard is traveling 12 miles per hour. How many feet does she travel in 10 seconds? (1 mile = 5280 feet)

A. 60
B. 88
C. 120
D. 176
E. 264

Kudos for a correct solution.

12 mi/1hr * 1 hr/60 min * 1 min/60 sec * 5280 ft/1 mi = 176 ft

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Re: Someone on a skateboard is traveling 12 miles per hour. How many feet [#permalink]

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12 Mar 2015, 21:10

12 miles = 12 * 5280

1hour = 60 * 60 seconds

Distance travelled in 10 seconds $$= \frac{12 * 10 * 5280}{60*60} = 176$$
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Re: Someone on a skateboard is traveling 12 miles per hour. How many feet [#permalink]

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12 Mar 2015, 21:40
2
Bunuel wrote:
Someone on a skateboard is traveling 12 miles per hour. How many feet does she travel in 10 seconds? (1 mile = 5280 feet)

A. 60
B. 88
C. 120
D. 176
E. 264

Kudos for a correct solution.

When working on changing units, it is advisable to do it in a single step with the units to avoid errors:

$$\frac{12 miles}{1 hour} = \frac{12 * 5280 feet}{60 * 60 secs} = 17.6 feet/sec$$

So distance traveled in 10 secs is 176 feet.

Check out this post for more on changing units: http://www.veritasprep.com/blog/2011/01 ... nd-ounces/
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Get started with Veritas Prep GMAT On Demand for $199 Veritas Prep Reviews Manager Joined: 06 Jan 2014 Posts: 67 Re: Someone on a skateboard is traveling 12 miles per hour. How many feet [#permalink] ### Show Tags 12 Mar 2015, 21:46 1 (12*5280) feets/60*60 seconds * 10 seconds seconds and seconds will cancel out . Ans. 176 feets (D) _________________ ______________________________ Liked the Post !!!! KUDOs Plzzzzz SVP Joined: 06 Nov 2014 Posts: 1888 Someone on a skateboard is traveling 12 miles per hour. How many feet [#permalink] ### Show Tags 12 Mar 2015, 22:40 1 Bunuel wrote: Someone on a skateboard is traveling 12 miles per hour. How many feet does she travel in 10 seconds? (1 mile = 5280 feet) A. 60 B. 88 C. 120 D. 176 E. 264 Kudos for a correct solution. 12 miles = 12 * 5280 = 63360 feet Someone is skateboarding at 63360 feet per hour. In 1 hour (i.e. 3600 seconds), distance travelled is 63360 feet. So, in 10 seconds, distance travelled is (63360 * 10)/3600 = 176 feet Hence option (D). -- Optimus Prep's GMAT On Demand course for only$299 covers all verbal and quant. concepts in detail. Visit the following link to get your 7 days free trial account: http://www.optimus-prep.com/gmat-on-demand-course
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Re: Someone on a skateboard is traveling 12 miles per hour. How many feet [#permalink]

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13 Mar 2015, 01:04
1
Bunuel wrote:
Someone on a skateboard is traveling 12 miles per hour. How many feet does she travel in 10 seconds? (1 mile = 5280 feet)

A. 60
B. 88
C. 120
D. 176
E. 264

Kudos for a correct solution.

+1 for D. 1 Mile =5280 feet. Distance traveled in 60 minutes=12*5280 feet
Therefore, distance traveled in 10s=5280*2/60=176 feet
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Joined: 09 Mar 2015
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Re: Someone on a skateboard is traveling 12 miles per hour. How many feet [#permalink]

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13 Mar 2015, 01:20
Answer for the above question is Option D
D.176
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Re: Someone on a skateboard is traveling 12 miles per hour. How many feet [#permalink]

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13 Mar 2015, 06:21

12 Mile/1hour= 12*5280/360=176 feet/sec
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Posts: 46207
Re: Someone on a skateboard is traveling 12 miles per hour. How many feet [#permalink]

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15 Mar 2015, 21:52
Bunuel wrote:
Someone on a skateboard is traveling 12 miles per hour. How many feet does she travel in 10 seconds? (1 mile = 5280 feet)

A. 60
B. 88
C. 120
D. 176
E. 264

Kudos for a correct solution.

MAGOOSH OFFICIAL SOLUTION:

The speed is 12 mph. To change this to feet/second, we need to multiply by (5280 ft/mile), to cancel miles, and to multiply by (1 hour/3600 second) to cancel seconds.
Attachment:

rar_img3.png [ 5.7 KiB | Viewed 2047 times ]

So, in 10 seconds, the skateboarder moves 176 feet.

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Re: Someone on a skateboard is traveling 12 miles per hour. How many feet [#permalink]

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27 Apr 2015, 09:20
Clocked 55 sec on this one and got it correct.

Here is how I approached it:

1) Convert number to unit in questions stem (i.e feet) 5280 * 12 = 63360

2) Convert 1 hour to unit in question stem (i.e. seconds) 60*60 - 3600

3) Divide --> 63360/60*60 * 10 (as we need to find how many feet does she travel in 10 seconds)

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Re: Someone on a skateboard is traveling 12 miles per hour. How many feet [#permalink]

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08 Feb 2017, 11:36
1
Bunuel wrote:
Someone on a skateboard is traveling 12 miles per hour. How many feet does she travel in 10 seconds? (1 mile = 5280 feet)

A. 60
B. 88
C. 120
D. 176
E. 264

We are given that a skateboarder has a rate of 12 mph. We need to determine how many feet she travels in 10 seconds. Let’s first convert 10 seconds to hours.

Since there are 3,600 seconds in an hour, 10 seconds = 10/3600 = 1/360 hours.

Since rate x time = distance, the skateboarder can travel 12 x 1/360 = 12/360 = 1/30 miles.

Finally, since 1 mile = 5,280 feet, the skateboarder travels 5,280 x 1/30 = 176 feet.

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Re: Someone on a skateboard is traveling 12 miles per hour. How many feet   [#permalink] 08 Feb 2017, 11:36
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