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WORD PROBLEMS

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Senior Manager
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Joined: 30 May 2005
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WORD PROBLEMS [#permalink]

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New post 05 Jun 2005, 15:35
This topic is locked. If you want to discuss this question please re-post it in the respective forum.

HELLO
what about this exercise
thanks


20. A car traveled 462 miles per tankful of gasoline on the highway and 336 miles per tankful of gasoline in the city. If the car traveled 6 fewer miles per gallon in the city than on the highway, how many miles per gallon did the car travel in the city?
(A) 14
(B) 16
(C) 21
(D) 22
(E) 27

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Senior Manager
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Location: Auckland, New Zealand
Re: WORD PROBLEMS [#permalink]

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New post 05 Jun 2005, 19:45
mandy wrote:
HELLO
what about this exercise
thanks


20. A car traveled 462 miles per tankful of gasoline on the highway and 336 miles per tankful of gasoline in the city. If the car traveled 6 fewer miles per gallon in the city than on the highway, how many miles per gallon did the car travel in the city?
(A) 14
(B) 16
(C) 21
(D) 22
(E) 27


If number of gallons per tank = T and number of miles per gallon on highway=H
HT=462
T(H-6)=336
solving the simultaneous equations gives the value of H and T to be 22 and 21.
hence answer is H-6=16
B

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Director
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New post 05 Jun 2005, 19:50
the relative rate = 6

to be covered = 462 - 336 = 126

=> rate = 126/6 = 21

therefore in the city it is 21-6 = 16

Last edited by Vithal on 05 Jun 2005, 19:54, edited 1 time in total.

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GMAT Club Legend
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Location: Singapore
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New post 05 Jun 2005, 19:52
on highway - 462 miles/tank
in city - 336 miles/tank

6 miles less per gallon in city than on highway:

assume 1 tanks = x gallons, then:

462/x = miles/gallon on highway
336/x = miles/gallon in city

462/x - 336/x = 6 miles/gallon
126/x = 6
x = 21 gallons

So 336/x = 336/21 = 16 (B)

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Senior Manager
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Joined: 17 Apr 2005
Posts: 372

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Location: India
Re: WORD PROBLEMS [#permalink]

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New post 06 Jun 2005, 11:15
mandy wrote:
HELLO
what about this exercise
thanks


20. A car traveled 462 miles per tankful of gasoline on the highway and 336 miles per tankful of gasoline in the city. If the car traveled 6 fewer miles per gallon in the city than on the highway, how many miles per gallon did the car travel in the city?
(A) 14
(B) 16
(C) 21
(D) 22
(E) 27


B.

For the tankful the car travelled 126 miles fewer than on the highway.
Hence the tank had 21 gallons ( 126/6)
Hence miles/gallon in city = 336/21 = 16.

HMTG.

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Re: WORD PROBLEMS   [#permalink] 06 Jun 2005, 11:15
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WORD PROBLEMS

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