Question

Car Y travels 105 miles on 3 gallons of petrol. Car Z travels 80 miles on 9 litres of petrol.

Which car has better petrol consumption ( more miles per gallon)?

You may use the fact that 1 gallon =4.5 litres


Options are

A. None

B. Y

C. Z

Answer 1

Car Z has better petrol consumption. Choice C. Z

Explanation:

Petrol Consumption

Car Y travels 105 miles on 3 gallons of petrol. The average consumption is 105 / 3 = 35 miles/gallon

Car Z travels 80 miles on 9 litres of petrol. Since 1 gallon=4.5 litres, the consumption of car Z is 9/4.5= 2 gallons. The average consumption is 80/2 = 40 miles/gallon.

This means that car Z has better petrol consumption. Choice C. Z