Answer:
Correct answer: Newer pump x = 3 hours
Step-by-step explanation:
We will first define the variables, let x be the time of the new pump
and 2 x the time of the old pump.
We set the formula as required for both pumps to work together to
drain the pool in 2 hours.
1/x + 1/2x = 1/2 ⇒
the common denominator for both divisions is 2x and that is why we multiply the first fraction by 2 and get:
2/2x + 1/2x = 1/2 ⇒ 3/2x = 1/2 ⇒ 2x = 6 ⇒ x = 3 hours
x = 3 hours
God is with you!!!
