Question 79
Two pipes A and B can fill a tank in 24 hours and 30 hours respectively. If both pipes are opend together, the time taken to fill the tank is
Solution
Two pipes A and B can fill a tank in 24 hours and 30 hours respectively.
Time taken by both pipes together = $$1\div(\frac{1}{24}+\frac{1}{30})$$
= $$1\div(\frac{5+4}{120})$$
= $$\frac{120}{9}=\frac{40}{3}$$ hours
=> Ans - (B)
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