"A ship 77 km from the shore, springs a leak which admits `2 1/4` tonnes of water in `5 1/2`minutes.
Channel: Doubtnut
Date: 2020-04-05

"A ship 77 km from the shore, springs a leak which admits `2 1/4` tonnes of water in `5 1/2`
minutes. 92 tonnes of water would sink it. But the pumps can throw out 12 tonnes of water per hour. Find the averages rate of sailing so that the ship may just reach the shore as it begins to sink."