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55.

Tube A will fill a tank in 24 minutes and Tube B in 48 minutes. If both pipes are left open at 7.14 a.m , how long will it take for the tank to fill?

56.

Tap A will fill a large vessel alone in 10 minutes.Tap B will fill the same vessel alone in 20 minutes.Tap C will empty the water-vessel in 15 minutes.If the vessel is initially empty and all three tubes are open, how long will it take for the vessel to fill?

57.

If A and B two nulls .if A is on then it is fill the tank in 50min and B is on then it fill the tank in 70min.How much tank fill if both A and B is on.

58.

A large tank can be filled using two pipes A and B in 3 h and 5 h, respectively. How long will it take to fill the entire tank if both the pipes are used to fill half of the tank and the rest of the half by A alone?

59.

A large tank can be filled using two pipes A and B in 3 h and 5 h, respectively. How long will it take to fill the entire tank if both the pipes are used to fill half of the tank and the rest of the half by A alone?