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Gasoline

Problem Solving — algebra and arithmetic (GMAT Focus Edition)
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Gasoline

by naveenhv » Mon Apr 25, 2011 8:37 am
At a speed of 50 miles per hour, a certain car uses 1 gallon of gasoline every 30 miles. If the car starts with a full 12 gallon tank of gasoline and travels for 5 hours at 50 miles per hour, the amount of gasoline used would be what fraction of a full tank?

a) 3/25
b) 11/36
c) 7/12
d) 2/3
e) 25/36
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Source: — Quantitative Reasoning |
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by vineeshp » Mon Apr 25, 2011 6:23 pm
You will get faster responses if you post these PS questions in the PS forum.

5 hours at 50 miles per hour.
Distance = speed * time = 5 * 50 =250 miles.

At this speed, car uses 1 gallon every 30 miles.
So total gas used = 250/30. = 25/3

So fraction of gas used to total = (25/3)/12
= 25/36
E
Vineesh,
Just telling you what I know and think. I am not the expert. :)
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