A new type of pump can drain a certain pool in 3 hours. An older pump can drain the pool in 9 hours. How long will it take both pumps working together to drain
the pool?

Respuesta :

Answer: Together the pool can be drained in 2 hours and 18 minutes.

Together the pool can be drained in 2 hours and 18 minutes.
Or if im correct 4.5 hours
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