SOLUTION: it takes pump A two hours less time than Pump B to empty a swimming pool. Pump A is started at 8:00 am and pump B is started at 10:00. At 12:00 pm, 60% of the pool is empty when pu

Question 1117528: it takes pump A two hours less time than Pump B to empty a swimming pool. Pump A is started at 8:00 am and pump B is started at 10:00. At 12:00 pm, 60% of the pool is empty when pump B book down. How much time at 12 pm would it take pump A to empty the pool?

Answer by Fombitz(32388) (Show Source): You can put this solution on YOUR website!

So,

and

Substituting,

.
.
So at 12:00PM, Pump A has worked for 4 hours, Pump B for 2 hours to get 60% out.

Substituting,

Only positive solutions allowed,

So then we need to find the new time, T, it takes Pump A to empty the remaining 40% of the pool.

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