A well `20m` deep and `3m` is diameter contains water to a dept of `14m`. How long will a `5 hp` engine take to empty it ?

Two cars move in the same direction along parallel roads. One of them is a 200m , long travelling with a velocity of 20m//s . The second one is 800m long travelling with a velocity of 7.5m//s . How long will it take for the first car to overtake the second car?

If a bus travelling at 20 m/s is subjected to a steady deceleration of 5 m//s^(2) , how long will it take to come to rest ?

A water tank is 13 m long, 14 m wide and 10 m deep. It is filled with water to a level of 5 m, what part of the tank is empty?

A well of inner diameter 14m is dug to a depth of 15m. Earth taken out of it has been evenly spread all around it to a width of 7m to form an embankment. Find the height of the embankment so formed.

A 25 m deep well contains water upto 15 m . An engine evacuates the well in 1.5 hrs . If the diameter of the well is 2 m ,calculate the power of the engine .

A pump is required to lift 1000kg of water per minute from a well 20m deep and eject it at a rate of 20ms^-1 . a. How much work is done in lifting water? b. How much work is done in giving in KE? c. What HP(horsepower) engine is required for the purpose of lifting water?

How many cubic meters of earth must be dug out to sinc a well 20m deep and has a diameter of 7m ? If the earth so dug out spread over a rectangular plot of 25m by 11m, What is height of the platform so formed?

A 30m deep well is having water upto 15 m . An engine evacutes it in one hour . The power of the engine. If the diameter of the well is 4m is