BREAKING: Target Test Prep releases Brand New 2026 On Demand GMAT prep course

Redeem

how many miles per gallon did the car travel in the city

This topic has expert replies
Post new topic Post Reply
Previous Topic Next Topic
Master | Next Rank: 500 Posts
Posts: 447
Joined: Sun Apr 19, 2009 9:08 pm
Location: Kolkata,India
Thanked: 7 times
GMAT Score:670

how many miles per gallon did the car travel in the city

by uptowngirl92 » Mon Jun 08, 2009 5:26 am
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, 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
Top
Source: — Problem Solving |
Legendary Member
Posts: 752
Joined: Sun May 17, 2009 11:04 pm
Location: Tokyo
Thanked: 81 times
GMAT Score:680

by tohellandback » Mon Jun 08, 2009 5:38 am
IMO B) 16
method:
In city. let's say the car travels x miles per galon
now car travels 336 miles in the city for 336/x gallons. so one full tank has 336/x gallons.
now the highway:
the car travels x+6 miles per gallon. Total gasoline in the tank=336/x gallons
so the car travels (330/x)*(x+6) miles =462
solve it and you get x=16

Hope it helps,
-Prem
The powers of two are bloody impolite!!
Top
User avatar
Master | Next Rank: 500 Posts
Posts: 472
Joined: Sun Mar 29, 2009 6:54 pm
Thanked: 56 times

by ssmiles08 » Mon Jun 08, 2009 6:30 am
I got (B) as my answer as well.

Rates:
city = r - 6
highway = r

Distances:
city = 336
highway = 462

336/(r-6) = 462/(r)

126r = 2772

r = 22

rate for city is r - 6

22-6 = 16
Top
Post new topic Post Reply
• Page 1 of 1