# maths

A water tank can be filled up by two pipes together in 30 minutes. One pipe fills up the tank in 32 min sooner than the other pipe when they are used separately. Find the time for each pipe to fill up the tank.

Can you explain how you set up the equation thx

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1. As with all such problems, consider how much of the job is done by each worker:

1/x + 1/(x-32) = 1/30
x=80,12

12 is bogus, since that would make x-32 negative.

So, the pipes can fill the tank in 80 and 48 minutes

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posted by Steve

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