A bus uses 18 gallons of petrol in fuel in traveling 270 miles. By how many miles per gallon the fuel mileage of the bus must be increased in order for it to travel the same distance using 10 gallons of petrol fuel?

A bus uses 18 gallons of petrol in fuel in traveling 270 miles. By how many miles per gallon the fuel mileage of the bus must be increased in order for it to travel the same distance using 10 gallons of petrol fuel?

A 8

B 9

C 12

D 15

Solution

Correct Answer: Option C