Solve.
-One pump can drain a pool in 8 minutes. When a second pump is also used, the pool only takes 6 minutes to drain. How long would it take the second pump to drain the pool if it were the only pump in use?
A)46 minutes
B) $\frac { 1 } { 24 }$ minute
C)24 minutes
D) $3 \frac { 3 } { 7 }$ minutes

Question

Quizplus · Accepted Answer

The first pump drains 1/8 of the pool per minute, and together they drain 1/6 of the pool per minute. Subtracting the rate of the first pump from the combined rate gives the rate of the second pump: 1/6 - 1/8 = 1/24 (pool per minute). To find the time it takes for the second pump to drain the pool, take the reciprocal of its rate, which is 24 minutes.

Solve -One Pump Can Drain a Pool in 8 Minutes 124\frac { 1 } { 24 }241​

Solve
-One Pump Can Drain a Pool in 8 Minutes $\frac { 1 } { 24 }$