Question

6 pipes can fill a tank in 1 hour 38 mins how long will it take if 7 pipes are used

Answer 1

Answer:

1 hour =60 minutes.

1 hour =60 minutes.1 hour 24 minutes =60+24=84 minutes

1 The time required to fill the tank by 6 pipes =84 minutesTime required to fill the tank by 1 pipe =84×6=504 minutes.Therefore,Time required to fill the tank by 7 pipes =

7504 =72 minutes

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Answer 2

let 1 pipe in 1 minute do x work

6 pipes in 98 minute will do work x*98*6

and total work done by 6 pipe =1

so x*98*6=1

x=1/98*6

now 1 pipe in 1 minute work =x

so 1 pipe work in one minute = 1/98*6

time taken by 7 pipe = 7/98*6

work done =98*6/7 minute

now total work done by 7 pipe to fill the tank = 84