Question

Pipe A and Pipe B could fill a tank together in 18

Q: Answer-Pipe A and Pipe B could fill a tank together in 18 hours and 12 hours respectively, while pipe C cou...

Let the capacity of the tank be 36 units. LCM of 18, 12 and 9 Efficiency of pipe A 3618 2 unitshr Efficiency of pipe B 3612 3 unitshr Efficiency of pipe C 369 4 unitshr ATQ, Tank filled by pipe A and B together in 5 hours 2 3 5 25 units Required time 254 6 14 hr 6 hr 15 min

hours and 12 hours respectively, while pipe C could empty it in 9 hours. If both inlet pipes are opened together for first 5 hours, then pipe C replaced them. Find the time taken by pipe C to empty the tank filled by pipe A and pipe B together.

A 6 hr 10 min

B 6 hr 15 min

C 5 hr 45 min

D 6 hr 30 min

E 7 hr

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Pipe A and Pipe B could fill a tank together in 18

Solution