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What was the average number of miles per gallon of gasoline for a truc

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Math Expert
Joined: 02 Sep 2009
Posts: 50570
What was the average number of miles per gallon of gasoline for a truc  [#permalink]

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22 Mar 2017, 02:30
00:00

Difficulty:

25% (medium)

Question Stats:

84% (01:07) correct 16% (01:24) wrong based on 33 sessions

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What was the average number of miles per gallon of gasoline for a truck during a certain trip?

(1) The total cost of the gasoline used by the truck for the 192-mile trip was \$23.00
(2) The cost of the gasoline used by the truck for the trip was \$2.10 per gallon.

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Intern
Joined: 07 Mar 2017
Posts: 6
Re: What was the average number of miles per gallon of gasoline for a truc  [#permalink]

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22 Mar 2017, 03:28
We want to know how many miles per gallon would be used on this trip. So we need the proportion miles/gallon.

(1) We got total miles and total cost of the gasoline, so we have (gallon used) x (unitary price) = 23 and total miles = 192
I couldn't find any connection to lead me to find how many gallons were used, so I considered insufficient

(2) We got the unitary price, that alone don't lead me to an answer, so I considered insufficient

Using both:
We can find how many gallons were used by using the information in (2) in the equation used in (1)
(gallon used) x 2.1 = 23
give us how many gallons
We have trip distance so we can do 192/(gallons used) = miles per gallon

So I go for C

Is that right?
Director
Joined: 21 Mar 2016
Posts: 522
Re: What was the average number of miles per gallon of gasoline for a truc  [#permalink]

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22 Mar 2017, 23:33
stat 1: no way to get total number of gallons consumed

stat2 : total number of gallons cannot be calculated..

stat 1 and stat 2 combined suff

ans C
Re: What was the average number of miles per gallon of gasoline for a truc &nbs [#permalink] 22 Mar 2017, 23:33
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