SOLUTION: One pump can empty the pool in 36 hours. The second pump is twice faster. After both pumps, working together emptied 1/3 of a pool the second pump broke. The first pump finished

Question 1056785: One pump can empty the pool in 36 hours. The second pump is twice faster. After both pumps, working together emptied 1/3 of a pool the second pump broke. The first pump finished the job. How long did it take to empty the pool?
Found 2 solutions by josgarithmetic, MathTherapy:
Answer by josgarithmetic(39616) (Show Source): You can put this solution on YOUR website!

WHICHPUMP RATE FIRSTPUMP SECONDPUMP COMBINED

The pumps in arrangement used, emptied 1 pool. Volume unit is in "pools".

total time to do all the emptying would be ; and each variable is solvable.
Answer by MathTherapy(10551) (Show Source): You can put this solution on YOUR website!
One pump can empty the pool in 36 hours. The second pump is twice faster. After both pumps, working together emptied 1/3 of a pool the second pump broke. The first pump finished the job. How long did it take to empty the pool?

Both pumps worked for 4 hours, and emptied of pool.
The 1st (slower) pump took 24 hours to empty remaining of pool.
Total time taken to empty pool:
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