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there is a one tank and A,B are two pipes.A can fill the tank in 25 minutes and B can empty the tank in 20 minutes.If both pipes are opened at same time.how much time needed the tank can fill?

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tank is nvr be filled............coz it takes more time to fill than to b empty..........
12 years agoHelpfull: Yes(4) No(0)

congrats buddy,please send me some questions .....
12 years agoHelpfull: Yes(1) No(0)
ans is 100 min to fill the tank 1/20-1/25=1/100 therefore in 100 min
12 years agoHelpfull: Yes(0) No(3)

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