Question

. A 100W BULB IS OPERATED FOR 8
HOURS DAILY. FIND THE COST OF
OPERATING THIS BULB FOR 30 DAYS.
ASSUMING THE COST OF ELECTRICITY IS 34
PER UNIT
Ans: Rs. 96​

Answer 1

Explanation:

Energy = Power*time

Energy consumed by 100 W bulb per day = 2∗100 Wh               

                                                                      = 0.2 kWh

Energy consumed by 40 W bulbs per day = 4∗40∗4 Wh

                                                                      = 0.64 kWh

Total energy consumed per day = 0.2 + 0.64 kWh

                                                   = 0.84 kWh 

Therefore, the energy consumed in 30 days = 30∗0.84 kWh

                                                                                    = 25.2 kWh

Answer 2

Answer:

30/100/3

90

_

10

33

34

×_132

99=131