Question: One pump can empty a pool in 5 days, whereas a second pump can empty the pool in 8 days. How long will it take

One pump can empty a pool in 5 days, whereas a second pump can empty the pool in 8 days. How long will it take the two pumps, working together, to empty the pool? (Fractional answers are OK.)

The first pump's rate is_?__ per day.

The second pump's rate is__?__ per day.

The combined pumps rate is __?__ per day.

It will take the two pumps__?__ days to empty the pool together

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