Question

A pump empties the pool at the rate of 1,000 gal every 4 hours. how long does it take to pump out 20,000 gallons?​

Answer 1

80 hours

Explanation:

We can use ratios to solve

1000 gal 20000

-------------- = ------------------

4 hours x hours

Using cross products

1000x = 4*20000

1000x = 80000

Divide each side by 1000

x = 80000/1000

x = 80

80 hours