A tank on the roof aa 20m high building can hold 10m^(3 of water.The tank is to be filled from a pond on the ground in 20 minutes.If the pump has an efficiency of 60%,then the input power in KW is

A pump on the ground floor of a building can pump of water to fill a tank of volume 30 ms^(3) in 15 min . If the tank is 40m above the ground and the efficiency of the pump is 30 % , how much electric power is consumed by the pump? ("Take" g = 10 ms^(2))

A pump on the ground floor of a building can pump of water to fill a tank of volume 30 ms^(3) in 15 min . If the tank is 40m above the ground and the efficiency of the pump is 30 % , how much electric power is consumed by the pump? ("Take" g = 10 ms^(2))

An electric pump on the ground floor of a building taken 10 minute to fill a tank of 45m^3 with water. The tank is 20 m above the water level . If electric power consumed by the pump is 30kW then efficiency of the pump will be ( density of water is 1000 kg/m^3 )

A pump on the ground floor of a building can pump up water to fill a tank of volume 30 m^3 in 15 min. If the tank is 60 m above the ground, and the efficiency of the pump is 40%, how much electric power is consumed by the pump? (Take g = 10 m s^(-2) )

A perosn decides to use his bath tub water to generate electric power to run a 40W bulb. The bath tub is located at a height of 10m from the ground and it holds 200 litres of water. He instals a water driven wheel generator on the ground. At what rate should the water drain from the bath tub to light the bulb? How long can he keep the bulb on , if bath tub was full initially ? Efficiency of generator is 90% . Take g=9.8m//s^(2)

Ten litre of water per second is lifted from well through 20m and delivered with a velocity of 10 m/s, then the power of the motor is :

A boy playing on the roof of a 10 m high building throws a ball with a speed of 10 m/s at an angle 30 ^@ with the horizontal. How far from the throwing point will the ball be at the height of 10 m from the ground? (g = 10 m//s ^ 2 )

The power of water pump is 4 kW. If g=10 ms^(-2), the amount of water it can raise in 1 minute to a height of 20 m is

The power of water pump is 4 kW. If g=10 ms^(-2), the amount of water it can raise in 1 minute to a height of 20 m is

A step down transformer converts transmission line voltage from 11000 V to 220 V. The primary of the transformer has 6000 turns and efficiency of the transformer is 60%. If the output power is 9 kW, then the input power will be