Question 450969
It takes 4 minutes to fill a tank with water. The tank has a hole, however, through which water drains. In 16 minutes the tank can go from full to empty. How long will it take to fill the tank if the hole is not repaired?
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Fill rate = 1/4 job/min
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Leak rate = 1/16 job/min
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Together rate = 1/x job/min
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Equation:
rate - rate = together rate
1/4 - 1/16 = 1/x
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Multiply thru by 16x to get:
4x - x = 16
3x = 16
x = 5 1/3 minutes (time to fill the tank when fill and leak are active.
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Cheers,
Stan H.
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