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# The pilot of a small aircraft with a 40-gallon fuel tank wants to fly

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Math Expert
Joined: 02 Sep 2009
Posts: 59590
The pilot of a small aircraft with a 40-gallon fuel tank wants to fly  [#permalink]

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24 Aug 2016, 05:13
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Difficulty:

5% (low)

Question Stats:

83% (01:15) correct 17% (01:49) wrong based on 165 sessions

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The pilot of a small aircraft with a 40-gallon fuel tank wants to fly to Cleveland, which is 480 miles away. The pilot recognizes that the current engine, which can fly only 8 miles per gallon, will not get him there. By how many miles per gallon must the aircraft’s fuel efficiency be improved to make the flight to Cleveland possible?

A. 2
B. 4
C. 12
D. 40
E. 160

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Re: The pilot of a small aircraft with a 40-gallon fuel tank wants to fly  [#permalink]

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24 Aug 2016, 05:39
Bunuel wrote:
The pilot of a small aircraft with a 40-gallon fuel tank wants to fly to Cleveland, which is 480 miles away. The pilot recognizes that the current engine, which can fly only 8 miles per gallon, will not get him there. By how many miles per gallon must the aircraft’s fuel efficiency be improved to make the flight to Cleveland possible?

A. 2
B. 4
C. 12
D. 40
E. 160

Actual miles/gallon is = 480/4 = 12 miles/gallon.

Current engine miles/gallon is 8 miles/gallon.

Additional 4 miles/gallon is required to match the actual mileage.

IMO option B.
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Re: The pilot of a small aircraft with a 40-gallon fuel tank wants to fly  [#permalink]

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19 Oct 2016, 11:48
40x=480 --> x = 12

12-8 = 4 (tank efficiency needs to be improved by this amount to make the trip)
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Re: The pilot of a small aircraft with a 40-gallon fuel tank wants to fly  [#permalink]

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30 May 2018, 17:18
Bunuel wrote:
The pilot of a small aircraft with a 40-gallon fuel tank wants to fly to Cleveland, which is 480 miles away. The pilot recognizes that the current engine, which can fly only 8 miles per gallon, will not get him there. By how many miles per gallon must the aircraft’s fuel efficiency be improved to make the flight to Cleveland possible?

A. 2
B. 4
C. 12
D. 40
E. 160

In order to fly to Cleveland (which is 480 miles away) with 40-gallon fuel tank, the fuel efficiency must be 480/40 = 12 miles per gallon. Since the current fuel efficiency is 8 miles per gallon, it must improve by 4 miles per gallon to make the trip to Cleveland possible..

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Re: The pilot of a small aircraft with a 40-gallon fuel tank wants to fly  [#permalink]

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03 Oct 2018, 01:10
Aircraft travelling rate required= 480/40= 12 gallons/hr
Aircraft present travelling rate= 8 gallons/hr
Diff= 12-8= 4 gallons/hr

(B)
Re: The pilot of a small aircraft with a 40-gallon fuel tank wants to fly   [#permalink] 03 Oct 2018, 01:10
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# The pilot of a small aircraft with a 40-gallon fuel tank wants to fly

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