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26 Mar 2018, 00:28
Kudos
Bookmarks
D
Be sure to select an answer first to save it in the Error Log before revealing the correct answer (OA)!
Difficulty:
5%
(low)
Question Stats:
96% (01:10) correct
4%
(01:18)
wrong
based on 119
sessions
History
Date
Time
Result
Not Attempted Yet
A certain car model averages 25 miles per gallon of gasoline. A certain truck model averages 12 miles per gallon of gasoline. If each vehicle is driven 1,200 miles, how much more gasoline (in gallons) will the truck use than the car?
(A) 26
(B) 32
(C) 48
(D) 52
(E) 68
(A) 26
(B) 32
(C) 48
(D) 52
(E) 68
26 Mar 2018, 01:21
Kudos
Bookmarks
Bunuel
Prime-factorizing, we get \(1200 = 12*25*4\)
If the truck model averages 12 miles/gallon of gasoline, it would need \(\frac{12*4*25}{12} = 100\) gallons of gasoline to drive 1200 miles.
If the car model averages 25 miles/gallon of gasoline, it would need \(\frac{12*4*25}{25} = 48\) gallons of gasoline to drive 1200 miles.
Therefore, the truck will use 100 - 48 = 52(Option D) more gallons of gasoline than the car.
26 Mar 2018, 11:59
Kudos
Bookmarks
Bunuel
\(\frac{Miles}{mpg}=\) Total gallons used*
Truck: \(\frac{1200}{12}=100\) gallons
Car: \(\frac{1200}{25}= 48\) gallons
Truck uses (100-48) = 52 more gallons
Answer D
*Units cancellation
\(\frac{Miles}{(\frac{Miles}{gallon})}=(Miles*\frac{Gallon}{Miles})=\) gallons used
