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# What was the average number of miles per gallon of gasoline consumed

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What was the average number of miles per gallon of gasoline consumed  [#permalink]

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11 Sep 2017, 00:31
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55% (hard)

Question Stats:

50% (01:04) correct 50% (00:56) wrong based on 63 sessions

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What was the average number of miles per gallon of gasoline consumed by Lorena's car during a certain trip?

(1) The car uses on average a gallon of gasoline for 18 miles driven
(2) The cost of the gasoline used by the car for the trip was \$24

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Re: What was the average number of miles per gallon of gasoline consumed  [#permalink]

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11 Sep 2017, 05:55
E. Need to know the price of gasoline / gallon.
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Re: What was the average number of miles per gallon of gasoline consumed  [#permalink]

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04 Mar 2018, 23:32
Bunuel Kindly help answer is not understood.
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Re: What was the average number of miles per gallon of gasoline consumed  [#permalink]

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05 Mar 2018, 02:19
Bunuel wrote:
What was the average number of miles per gallon of gasoline consumed by Lorena's car during a certain trip?

(1) The car uses on average a gallon of gasoline for 18 miles driven
(2) The cost of the gasoline used by the car for the trip was \$24

To calculate the average miles per gallon we need to know the amount of miles driven and the amount of gallons consumed.
We'll look for statements that give us this information, a Logical approach.

(1) does not give us the total number of miles driven or gallons used on Lorena's trip.
Insufficient.

(2) does not give us the miles driven or the amount of gallons used on Lorena's trip.
Insufficient.

Combined: Since there is no way to combine the information in the statements, we still cannot answer.

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Re: What was the average number of miles per gallon of gasoline consumed  [#permalink]

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07 Mar 2018, 02:28
It is given that car drove 18miles on a gallon of gasoline. Then , why can't we assume that the total distance was 18 miles and a gallon was consumed in the trip.
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Re: What was the average number of miles per gallon of gasoline consumed  [#permalink]

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07 Mar 2018, 02:33
xvijaykumar wrote:
It is given that car drove 18miles on a gallon of gasoline. Then , why can't we assume that the total distance was 18 miles and a gallon was consumed in the trip.

Hey xvijaykumar ,

No, that is not correct. If I am saying the speed of my car is 60 km/hour. That doesn't mean I am travelling only 60 Kms or only for one hour. I could travel 100s of hours with that speed.

Similarly, 1 gallon is what it takes for 18 miles. That doesn't mean I am travelling only 18 miles.

Does that make sense?
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Re: What was the average number of miles per gallon of gasoline consumed  [#permalink]

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07 Mar 2018, 02:35
xvijaykumar wrote:
It is given that car drove 18miles on a gallon of gasoline. Then , why can't we assume that the total distance was 18 miles and a gallon was consumed in the trip.

Hello

It is NOT given that 'car drove 18 miles on a gallon of gasoline'. Rather what is given is that 'car uses on average a gallon of gasoline for 18 miles driven'. But we don't know how many miles Lorena drove on this particular trip.
Re: What was the average number of miles per gallon of gasoline consumed   [#permalink] 07 Mar 2018, 02:35
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