Question

a cterin can be filled by one tap in 4 hour and byanother 3 hour .how long will it take to fill if


both tap are oper ened togather.

Answer 1

One hour work of ,
First tap =1/4 part
Another tap =1/3 part
Both tap =1/4+1/3
=3+4/12
=7/12 hr
so it can be filled in 7/12 hr
=7/12×60min
=35 min