Timework9

Refer to the data below and answer the questions that follow.
The boiler tank in a chemical factory holds 10⁵; litres. 5 tanks each having one-fifth the capacity of the boiler tank fill in ‘hard water’ at same rates in the boiler tank in 2 hours. The outlet of the two of smaller tanks work as inlet pipes and other two work as outlet and the fifth tank fill in the main ‘boiler’ at half its efficiency.

34Only three pipes are working, two at their full efficiency and the third one with half of its efficiency and all three are acting as an inlet. If all the three are opened alternately with the latter pipe being first to be opened to fill the boiler such that each smaller tank fills 'hard water' in the main boiler for equal time, then number of hours taken to fill the boiler to half its capacity is

Option : C
Explanation :
Here fraction of tank filled in 1 hour
th of the tank
If they are opened alternately, then tank gets filled in 4 x 3 = 12 hours
Hence half of the tank gets filled in 12/2 = 6 hours.

Forgot your password?

I agree with the Terms.

Back to login