1.

1). \(3\frac{2}{7}\) hours2). \(3\frac{3}{7}\) hours3). \(3\frac{1}{7}\) hours4). None of these

Answer»

? Time TAKEN by first pipe to fill the tank = 6 hours

∴ In one HOUR the First pipe can fill tank (by volume) = (1/6)

? Time taken by Second pipe to fill the tank = 8 hours

∴ In one hour the Second pipe can fill tank (by volume) = (1/8)

⇒ If operated together the two pipes can fill tank (by volume) in one hour = (1/6) + (1/8)

= 14/48

= 7/24

⇒ The Tank will be FILLED in time = 24/7 HRS $(3\frac{3}{7})$ hours


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