Calculate the electricity bill amount for the month of November of a family if 4 tube lights of 40 W each for seven hours, a TV of 150 W for three hours and two bulbs of 60 W each for four hours are used per day. The cost per unit is RS 3.50.

An electric bulb of 60 W is used for 6 hours per day. Calculate the units of energy consumed in one day by the bulb.

An electric heater of 1000W is used for 2 hours a day. What is the cost of using it for a month of 28 days, if 1 unit costs is 3.00 ?

A household uses the following electric appliance: Two electric fans of rating 80 W each for 12 hours each day , find energy consumed.

An electic room heater is rated at 2 kW. Calculate the cost of using it for 2 hours daily for the month of september, if each unit costs Rs. 4.00

A bus stop is barricaded from the remaining part of the road, by using 50 hollow cones made of recycled cardboard. Each cone has a base diameter of 40 cm and height 1 m. If the outer side of each of the cones is to be painted and the cost of painting is Rs 12 per m^2 , what will be the cost of painting all these cones (use pi = 3.14 , and take sqrt(1.04)=1.02 ) ?

An electric refrigerator rated 500 W operates 24 hours/day. What is the cost of the energy to operate it for 20 days at Rs.2.00 per kWh?

An electric bulb of power 40 W is lighted daily for 8 hours for 15 days how many units of electric energy will be consumed? also find the amount of electric bill if the rate of electricity consumption is rs.8.00 per unit

A household uses the following electric appliance: Refrigerator of rating 400 W for 10 hours each day , find the energy consumed.