16. A pump can till a tank fully in seven and half hours. One day the pump was started and closed after fillingth of the 3/5 tank. For how many hours was the pump working?
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Step-by-step explanation:
Rate of filling the Tank by Pump : 1/2
Rate of leak while water is being pumped in the tank: 3/7
Rate of leak in the tank: 1 hour =( 1/2 − 3/7)
= 1/41
.
∴ Leak will empty the tank in 14 hrs.
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