A pipe can fill a tank in 10 hours. Due to a leak at the bottom, it takes 12 hours. How long will the leak take to empty the full tank?
A50 hours
B60 hours
C70 hours
D80 hours
Explanation
Leak’s rate per hour = 1/10 – 1/12 = (6 – 5)/60 = 1/60. Time taken by leak alone = 60 hours.
Exam Relevance
- Topic: Work and Time
- Subtopic: Pipes and Cisterns
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