In a house, a 400 watt refrigerator is used for 4 hours, 2 80 watt fans are used for 12 hours and 8 100 watt...

It takes 12 hours to fill a swimming pool using two pipes.If the pipes of larger diameter is used for 4 hours and the pipe of smaller diameter is used for 9 hours,only half of the pool is filled.How long would it take for each pipe to fill the pool separately?

A 400 watt carrier is modulated to a depth of 80% . Calculate the total power in the modulated wave.

Calculate the units of electricity consumed in the month of September form the following details. (i) One 40 W bulb used for 5 hours daily. (ii) One 100 W bulb used for 4 hours daily. (iii) One 240 W electric fan used for 4 hours daily. Also calculate the monthly bill at the rate of Rs 3 per unit.

one man,3 woman and 4 boys can do a work in 96 hours.2 man and 8 boys can do same work in 80 hours and 2 man and 3 woman can do same work in 120 hours.5 man and 12 boys finish same work in hours?

In a house there are four bulbs each of 50W and 5 fans each of 60W. If they are used at the rate of 6 hours a day, the electrical energy consumed in a month of 30 days is

Five electric fans of 120 watts each are used for 4 hours. Calculate the electrical energy consumed in kilowatt-hours.

On an electric heater 220 volt and 1100 watt are marked. On using it for 4 hours, the energy consumed in kWh will be

The heat produced by a 100 watt heater in 2 minute will be equal to