Question

"
suppose a house there are two bulbs of 40 w each, two fans of 100w each. All of them are used
for two hours a day. Find the cost of electric energy used in 30 days at Rs 3.00 per unit.​

Answer 1

Answer:

two bulbs total energy used=40+40=80

two fans total energy used=100+100=200

total energy of bulbs and fans=200+80=280

1unit=3Rs

280w=280×3=840Rs