SOLUTION: Pump R can fill a tank in 8 hours and Pump Q can
empty it in 12 hours. If both pumps are in operation,
how long will it take to fill the tank?
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-> SOLUTION: Pump R can fill a tank in 8 hours and Pump Q can
empty it in 12 hours. If both pumps are in operation,
how long will it take to fill the tank?
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Question 1163866: Pump R can fill a tank in 8 hours and Pump Q can
empty it in 12 hours. If both pumps are in operation,
how long will it take to fill the tank? Answer by ikleyn(52798) (Show Source):
Pump R adds of the tank volume per hour,
while Pump Q drains of the tank volume per hour.
The net inflow rate is then the difference
- = = of the tank volume per hour.
Hence, in 24 hours the tank will be filled.
