In a house 3 bulb of 25 W. Each are used for 5 hours a day. Calculate units of electricity consumed in a month a 31 days. Also, find the total expenditure if 1 unit of electricty costs Rs. 2.50

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 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

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 ?

An electrical appliance of 1000 W is used 6 hours/day. What is the electricity bill of the appliance in one day it the rate charged by electricity board is Rs.4/unit?

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

Three schools A, B and C organised a mela for collecting funds for helping the rehabilitation of flood victims. They sold hand made fans, mats and plates form recylced material at a cost of Rs. 25, Rs. 100 and Rs 50 each. The number of articles sold are given below: Find the funds collected by each school separately by selling the above articles. Also find the total funds collected for the purpose.

A factory makes tennis rackets and cricket bats. A tennis racket takes 1.5 hours of machine time and 3 hours of craftman’s time in its making while a cricket bat takes 3 hour of machine time and 1 hour of craftman’s time. In a day, the factory has the availability of not more than 42 hours of machine time and 24 hours of craftsman’s time. If the profit on a racket and on a bat is Rs 20 and Rs 10 respectively, find the maximum profit of the factory when it works at full capacity.

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 is rated 220V and 100 W. what is its resistance? Five such bulbs burn for 4 hours. What is the electrical energy consumed? Calculate the cost if the rate is 50 paise per unit.