Latest Syntel Aptitude Question SOLUTION: There are 3 pipes A, B and C that when opened simultaneously would fill a tank in 20 minutes. C can fill the tank twice as fast as A which in turn would fill the tank twice as fast

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(#M40003680) SYNTEL Numerical Ability question Keep an EYE

There are 3 pipes A, B and C that when opened simultaneously would fill a tank in 20 minutes. C can fill the tank
twice as fast as A which in turn would fill the tank twice as fast as B. How long will it take for B alone to
fill the tank?

Asked In Syntel (12 years ago)

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Dr.Dipin Singh  (12 years ago)

If b is the time ( in minutes) taken by pipe B to fill the tank.
Then 1/b tank is filled by B in 1 minute

2/b tank is filled by A in 1 min
4/b tank is filled by c in 1 min.

1/b + 2/b+ 4/b tank is filled by 3 pipes in 1 min.

as per given condition,

1/b + 2/b+ 4/b = 1/20
7/b = 1/20
b=140

so pipe B alone can fill tank in 140 hrs.

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