Question

The Donovan’s pool system cleans 35 gallons of water every 1/4 hour. How many gallons of water are cleaned in 5 hours?

Answer 1

35 gallons        x gallons

-------------    =    ---------

1/4 hour             5 hours

using cross products

35 * 5 = 1/4 * x

175 = 1/4 x

multiply each side by 4

175 * 4 = 1/4 *4x

700 = x

700 gallons are cleaned in 5 hours