RRB Government Jobs Exams

One pipe can fill a tank in 20 minutes, while another takes 30 minutes to fill the same tank. How long would it take the two pipes together to fill the tank?

Read Solution (Total 1)

A pipe can fill a tank in 20 min........
so work done by A=1/20
B pipe can fill a tank in 30 min........
so work done by B=1/30
(A+B)'s work done 2gether = 1/20+1/30=5/60=1/12
total time=12 mins
11 years agoHelpfull: Yes(0) No(0)

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