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.
- 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.
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