SOLUTION: if pump A empties a tank in 2 hours and pump B empties a tank in 4 hours how long will it take them to empty a tank if they work together

Question 948265: if pump A empties a tank in 2 hours and pump B empties a tank in 4 hours how long will it take them to empty a tank if they work together
Answer by Alan3354(69443) (Show Source): You can put this solution on YOUR website!
if pump A empties a tank in 2 hours and pump B empties a tank in 4 hours how long will it take them to empty a tank if they work
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In 1 hour, pump A empties 1/2 the tank.
In 1 hour, pump B empties 1/4 the tank.
Together, they empty 3/4 of the tank per hour.
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