Reading Time: < 1 minute
Last Updated on May 11, 2023
GMAT OFFICIAL GUIDE PS
Solution:
Since the car has a constant rate of 1 mile per minute, we can let r = the rate of the car in miles per hour and create the following equation:
1/1 = x/60
x = 60 mph
Since the car uses 5 gallons of fuel every 2 hours, we can let x = the number of hours driven when the car uses 3.75 gallons of fuel and create the following proportion:
5/2 = 3.75/x
5x = 7.5
x = 1.5 hours
We know that the rate of the car is 60 mph and the car has driven 1.5 hours; thus, the distance driven is 60 x 1.5 = 90 miles.
Answer: E
