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.

A ship 60 km from the shore spring a leak which admits 3(3)/(4) tonnes of water in 15 min. 25 tonnes of water would suffer to sink her, but the pumps can thrown out 12(1)/(2) tonnes of water an hour. Find the average rate of sailing that the she may just reach the shore as she begins to sink.

A ship 55 km from the shore springs a leak which admits 2 tonnes of water in 6 min . 80 tonnes of water would suffer to sink it, but the pumps can throw out 12 tonnes of water an hour. Find the average rate of sailing that it may just reach the shore as it begins to sink

A ship, 40 kilometres from the shore, springs a which admits 3 3/4 tonnes of water in 12 minutes. 60 tonnes would suffice to sink her, but the ship, pumps can throw out 12 tonnes of water in hour. Find the average rate of sailing, so that may reach the shore just as she begins to sink. 1 1/2k m//h r b. 2 2/1k m//h r c. 3 1/2k m//h r d. 4 1/2k m//h r

A water tank has the shape of an inverted righ circular cone with its axis vertical and vertex lowermost . Its semi-vertical angle is tan^(-1)(0.5) . Water is poured into it at a constant rate of 4 cubic meter per hour . Find the rate at which the level of the water is rising at the instant when the depth of water in the tank is 2 m.

Find the power (in W) of a pump if it can lift 1 tonne of water by 90 m in 30 minutes. (assume 100% effciency and use g = 10m//s^2)

A conical vessel whose height is 4 metres and of base radius 2 metres is being filled with water at the rate of 0.75 cubic metres per minute.Find the rate at which the level of the water is rising when the depth of water is 1.5 metres.?

A water tank has the shape of an inverted right - circular cone with its axis vertical and vertex lower most. Its semi - vertical angle is tan^(-1)((1)/(2)) . Water is poured into it at a constant rate of 5 cubic meter per minute. Find the rate at which the level of the water is rising at the instant when the depth of water in the tank is 10 m.