Two pipes, A and B, empty into a reservoir. Pipe A can fill the reservoir in 30 minutes by itself. How long will it take for pipe A and pipe B together to fill up the reservoir?
(1) By itself, pipe B can fill the reservoir in 20 minutes. --- Since from the question we have that the work done by Pipe A = 1/30. We only needed work done by B hence sufficient.
(2) Pipe B has a larger cross-sectional area than pipe A- Does not talk about the work done by B. Might be possible that the water flow is
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(1) By itself, pipe B can fill the reservoir in 20 minutes. --- Since from the question we have that the work done by Pipe A = 1/30. We only needed work done by B hence sufficient.
(2) Pipe B has a larger cross-sectional area than pipe A- Does not talk about the work done by B. Might be possible that the water flow is
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