- A4 hours
- B6 hours
- C3 hours
- D12 hours
Step-by-Step Solution
The first pipe runs 4 h in all: . The second fills in 2 h, so alone 6 hours.
Answer: B) 6 hours
One pipe alone fills a tank in 6 hours. It runs for 2 hours, then a second pipe is also opened, and the tank is full 2 hours later. How long does the second pipe take alone?
Class 8Leaks and Changing PipesDirect and Inverse Proportions
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