Question

A car is driven along a level road. The total energy is put from the petrol is 60 KJ, and the car
wastes 45KJ of energy. What is the efficiency of the car?
a. 15%
b. 45%
c. 25%
d. 75%​

Answer 1

Answer:

c. 25%

Explanation:

If 45 out of 60 is wasted, that’s 3/4.

if 3/4 is wasted, then 1/4 is used.

Another way of saying 1/4 is 25%