What is the time taken by two pipes M and N together to fill a tank completely given that pipes M and N can fill the tank in 42 and 56 minutes respectively?

- 24 minutes
- 26 minutes
- 28 minutes
- 42 minutes

Option 1 : 24 minutes

Let's discuss the concepts related to Time and Work and Pipe and Cistern. Explore more from Quantitative Aptitude here. Learn now!

Part filled by pipe M in 1 minute = (1/42)

Part filled by pipe N in 1 minute = (1/56)

Part filled by pipe M and N together in 1 minute

⇒ (1/42) + (1/56)

⇒ 1/24

∴ Time taken by both the pipes together to fill the tank = 24 minutes

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