A cylindrical container of capacity 90 litre has two holes on its side wall. One hole is in the middle of its height which drains out 10 litre of water per hour. The other hole is just above the bottom and it drains out 5 litre of water per hour. If the container is filled full with water, then in how much time will it become empty?
A. 6 hours
B. 9 hours
C. 10 hours
D. 12 hours
Answer:D
A cylindrical container of capacity 90 litre has two holes on its side wall. One hole is in the middle of its height which drains out 10 litre of water per hour. The other hole is just above the bottom and it drains out 5 litre of water per hour. If the container is filled full with water, then in how much time will it become empty?
A. 6 hours B. 9 hours C. 10 hours D. 12 hours