A pipe can fill a pool in 8 hours, but due to a leak at the bottom, it takes 10 hours. How long will the leak take to empty a full pool?
A30 hours
B36 hours
C40 hours
D48 hours
Explanation
Rate of leak = 1/8 – 1/10 = (5 – 4) / 40 = 1/40 per hour. Time to empty full pool = 40 hours.
Exam Relevance
- Topic: Work and Time
- Subtopic: Pipes and Cisterns
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