Question

Pipes K and L alone can fill a tank in 4 hours and 6 hours

Q: Answer-Pipes K and L alone can fill a tank in 4 hours and 6 hours respectively. When both pipes along with...

Let the total capacity of the tank be 12 litres.Efficiency of Pipe K 12 4 3 litreshourEfficiency of Pipe L 12 6 2 litreshourLet pipe M empties the tank with an efficiency of m litreshour.Tank filled in 120 minutes 34 12 9 litresATQ,3 2 - m 12060 95 - m 2 910 - 2m 92m 1m 0.5 litreshourTime taken by M to empty the tank 12 0.5 24 hours

respectively. When both pipes along with pipe M, an outlet pipe, are opened together, 3/4 of the tank gets filled in 120 minutes. Find the time taken by pipe M to empty a completely filled tank.

A 18 hours

B 20 hours

C 22 hours

D 24 hours

E 26 hours

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NIACL Administrative Officer

Pipes K and L alone can fill a tank in 4 hours and 6 hours

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