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A certain taxi company charges $3.10 for the first 1/5 of a

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goodglory
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A certain taxi company charges $3.10 for the first 1/5 of a [#permalink] New post  04 Dec 2007, 20:37
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A certain taxi company charges $3.10 for the first 1/5 of a mile plus $0.40 for each additional 1/5 of a mile. What would this company charge for a taxi ride that was 8 miles long?

A. 15.60
B. 16.00
C. 17.50
D. 18.70
E. 19.10
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GK_Gmat
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Re: Taxi Company PLEASE HELP [#permalink] New post  04 Dec 2007, 21:59
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goodglory wrote:
A certain taxi company charges $3.10 for the first 1/5 of a mile plus .40 for each addtional 1/5 of a mile. What would this company charge for a taxi ride that was 8 miles long?

A. 15.60
B. 16.00
C. 17.50
D. 18.70
E. 19.10


How many 1/5 miles does 8 miles contain?
= 8/(1/5) = 40
Charge for first 1/5 mile = 3.10
Charge for remaining 39 1/5 miles = 39*.4 = 15.6
Total charge = 15.6 + 3.10 = 18.70
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Abhishek009
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Re: A certain taxi company charges $3.10 for the first 1/5 of a [#permalink] New post  14 Nov 2016, 00:27
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goodglory wrote:
A certain taxi company charges $3.10 for the first 1/5 of a mile plus $0.40 for each additional 1/5 of a mile. What would this company charge for a taxi ride that was 8 miles long?

A. 15.60
B. 16.00
C. 17.50
D. 18.70
E. 19.10


8 Miles = 40 parts... ( Each mile = 1/5 mile )

Charges for 1st part = $ 3.10

Charges for 39 reamaining part = 0.40 * 39 = 15.60

So, Total charges for 8 miles ( ie, 40 parts ) is 18.70 ( ie, 3.10 + 15.60 )

Hence, answer will be (D)
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BrentGMATPrepNow
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Re: A certain taxi company charges $3.10 for the first 1/5 of a [#permalink] New post  08 Nov 2021, 15:30
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goodglory wrote:
A certain taxi company charges $3.10 for the first 1/5 of a mile plus $0.40 for each additional 1/5 of a mile. What would this company charge for a taxi ride that was 8 miles long?

A. 15.60
B. 16.00
C. 17.50
D. 18.70
E. 19.10


In other words, the taxi company charges $3.10 for the first 0.2 miles PLUS $0.40 for each additional 0.2 miles.

Let's think of the 8-mile taxi ride in two parts:
Part I) The first 0.2 miles
Part II) The remaining 7.8 miles

Part I: The first 0.2 miles costs $3.10

Part II: 7.8 ÷ 0.2 = 39 0.2-mile increments.
So, the total cost of those 39 increments = (39)($0.40) = $15.60

So, the total cost of the entire trip = $3.10 + $15.60 = $18.70

Answer: D
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Bunuel
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A certain taxi company charges $3.10 for the first 1/5 of a [#permalink] New post  23 Feb 2013, 07:32
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A certain taxi company charges $3.10 for the first 1/5 of a mile plus $0.40 for each additional 1/5 of a mile. What would this company charge for a taxi ride that was 8 miles long?

A. 15.60
B. 16.00
C. 17.50
D. 18.70
E. 19.10

1/5 miles = 0.2 miles.

The cost of 8 miles long ride would be $3.10 for the first 0.2 miles plus (8-0.2)/0.2*0.4 = $3.1 + $15.6 = $18.7.

Answer: D.
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Re: Taxi Company PLEASE HELP [#permalink] New post  04 Dec 2007, 21:22
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goodglory wrote:
A certain taxi company charges $3.10 for the first 1/5 of a mile plus .40 for each addtional 1/5 of a mile. What would this company charge for a taxi ride that was 8 miles long?

A. 15.60
B. 16.00
C. 17.50
D. 18.70
E. 19.10


= 3.10 + (8 - 0.2) 0.4/0.2
= 3.10 + 15.6
= 18.7
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sondenso
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Re: Taxi Company PLEASE HELP [#permalink] New post  04 Dec 2007, 22:45
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GMAT TIGER wrote:
goodglory wrote:
A certain taxi company charges $3.10 for the first 1/5 of a mile plus .40 for each addtional 1/5 of a mile. What would this company charge for a taxi ride that was 8 miles long?

A. 15.60
B. 16.00
C. 17.50
D. 18.70
E. 19.10


= 3.10 + (8 - 0.2) 0.4/0.2
= 3.10 + 15.6
= 18.7


Dear Gmatiger

Can you help me to understand why the result must be divided into 0.2?
I am confused!
Thanks,
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Re: Taxi Company PLEASE HELP [#permalink] New post  05 Dec 2007, 17:52
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sondenso wrote:
GMAT TIGER wrote:
goodglory wrote:
A certain taxi company charges $3.10 for the first 1/5 of a mile plus 0.40 for each addtional 1/5 of a mile. What would this company charge for a taxi ride that was 8 miles long?

A. 15.60
B. 16.00
C. 17.50
D. 18.70
E. 19.10


= 3.10 + (8 - 0.2) 0.4/0.2
= 3.10 + 15.6
= 18.7


Dear Gmatiger

Can you help me to understand why the result must be divided into 0.2?
I am confused!
Thanks,


it is just an unitary method:

The cost per 1/5 (0.2) miles is 0.4 beyond first 1/5 (0.2) miles.
so 0.2 miles costs 0.4, then how much 1 mile costs? 2. how 0.4/0.2 = 2.
so 1 mile costs 2, then 7.8 (=8-0.2) miles cost 7.8x2 = 15.6

so total = 3.1+15.6 = 18.7
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eschn3am
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[#permalink] New post  05 Dec 2007, 19:22
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fastest way for me...

8 miles * 5 = 40 fifths of a mile
40 * .40 = $16
$16 - .40 = 15.60 + 3.10 = 18.70

breaking it up like that lets you do the mental math in your head almost instantly. so much easier IMO.
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fozzzy
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Re: A certain taxi company charges $3.10 for the first 1/5 of a [#permalink] New post  23 Feb 2013, 08:08
why are we dividing by 0.2?
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Re: A certain taxi company charges $3.10 for the first 1/5 of a [#permalink] New post  23 Feb 2013, 08:11
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fozzzy wrote:
why are we dividing by 0.2?


We need to find the number of 0.2 miles in 7.8 miles ($0.40 for each).
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Re: A certain taxi company charges $3.10 for the first 1/5 of a [#permalink] New post  17 Aug 2013, 12:43
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goodglory wrote:
A certain taxi company charges $3.10 for the first 1/5 of a mile plus $0.40 for each additional 1/5 of a mile. What would this company charge for a taxi ride that was 8 miles long?

A. 15.60
B. 16.00
C. 17.50
D. 18.70
E. 19.10

8-1/5 = 39/5

1/5 + 39/5 = 3.1 + 0.4 * 39 = 18.7 = (D) (Answer)
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Re: A certain taxi company charges $3.10 for the first 1/5 of a [#permalink] New post  16 Nov 2016, 09:00
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goodglory wrote:
A certain taxi company charges $3.10 for the first 1/5 of a mile plus $0.40 for each additional 1/5 of a mile. What would this company charge for a taxi ride that was 8 miles long?

A. 15.60
B. 16.00
C. 17.50
D. 18.70
E. 19.10


We know that for the first 1/5 mile of the 8-mile trip, the taxi company charges $3.10. For the next 7 4/5 miles, each 1/5 of a mile will cost $0.40. We need to find out how many 1/5s are in 7 4/5.

Since 7 4/5 = 39/5, there are 39 1/5s in 7 4/5. Therefore, the total cost of the 8-mile trip would be:

$3.10 + 39($0.40)

$3.10 + $15.60

$18.70

Answer: D
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Re: A certain taxi company charges $3.10 for the first 1/5 of a [#permalink] New post  16 Jul 2017, 05:08
Can someone please explain how there are 40, 1/5 miles in 8 miles?
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Re: A certain taxi company charges $3.10 for the first 1/5 of a [#permalink] New post  16 Jul 2017, 05:11
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longhaul123 wrote:
Can someone please explain how there are 40, 1/5 miles in 8 miles?

________________
8/(1/5) = 8*5 = 40.
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