Question

It took Jackie two hours to mow the lawn. Two weeks later it took her one and one-half hours to mow the lawn. What can be said about the amount of power used by Jackie the second time she mowed the lawn?

Answer 1

Answer: The amount of power used by Jackie will be more the second time.

Explanation: Power can be written as:

$Power=\frac{Work}{Time}$

As the power and time follow inverse relationship, the amount of power used by Jackie will be less in first case because the time taken is more.

In the second case, the time taken is less than the first case, so the power used will be more.