Question

A large tank is filled with water at a rate of 70 cubic feet per hour. If it takes 9 hours to fill the tank, which of the following is closest to the volume, in cubic feet, of the water in the tank?

8
61
79
630

Answer 1

630

Explanation:

if it takes 1 hour for it to fill up by 70 ft³

then after 9 hours it is full.

9 X 70 = 630 ft³