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One inlet pipe fills an empty tank in 5 hours. A second inlet pipe fills the same tank in 3 hours. If both pipes are used together, how long will it take to fill 2/3 of the tank?
My Work:
Let x = time when both pipes are used together
(1/5) + (1/3) = 1/x
I found x to be 15/8 hours.
Must I now multiply (15/8)(2/3)?
My Work:
Let x = time when both pipes are used together
(1/5) + (1/3) = 1/x
I found x to be 15/8 hours.
Must I now multiply (15/8)(2/3)?