If two inlet pipes are both open, they can fill a pool in 3hours and 36 minutes. One of the pipes can fill the pool by itself in 6 hours. How long, in hours, would it take the other pipe to fill the pool by itself?
A) 9 hours
B) 6 hours
C) 15 hours

Question

Quizplus · Accepted Answer

The total time taken by both pipes to fill the pool is 3 hours and 36 minutes, which is 3.6 hours. If one pipe fills the pool in 6 hours, we can use the formula for combined work rates: 1/A + 1/B = 1/T, where A and B are the times taken by each pipe alone, and T is the time taken together. Substituting the known values, we get 1/6 + 1/B = 1/3.6. Solving for B gives B = 9 hours.

If Two Inlet Pipes Are Both Open, They Can Fill