Question
Pipe A fills a tank in 10 hr, Pipe B in 15 hr, and Pipe C empties in 30 hr. All open together. Time to fill?
Solution
ATQ,
→ 1/10 + 1/15 – 1/30 = 2/15
→ Time = 15/2 = 7.5 hr = 7 hr 30 min
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