SOLUTION: with both hot and cold water running, a bathtub can be filled in 10 minutes. The drain will empty the tub in 15 minutes. A child turns both faucets on and leaves the drain open.
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-> SOLUTION: with both hot and cold water running, a bathtub can be filled in 10 minutes. The drain will empty the tub in 15 minutes. A child turns both faucets on and leaves the drain open.
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Question 547604: with both hot and cold water running, a bathtub can be filled in 10 minutes. The drain will empty the tub in 15 minutes. A child turns both faucets on and leaves the drain open. How long will it be before the bathtub starts to overflow? Answer by josmiceli(19441) (Show Source):
You can put this solution on YOUR website! Sum up the rates of filling and draining
to get the rate with both faucets open
and drain open
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( 1 tub ) / ( 10 min ) = rate of filling with
both faucets open
( 1 tub ) / (15 min ) = rate of emptying
with drain open
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Let = time to fill tub in min
Multiply both sides by
In 30 min the tub will start to overflow
