Question

An electric bulb of 60W is lighted for 10 hours a day. What is

the amount to be paid in a month of 30 days, if one unit of

electricity of costs Rs. 3.50?

Answer 1

Power of bulb = 60W = 60/1000 Kw
Time = 10 hours

Energy Consumed in one day = 60/1000*10
                                                 = 6/10 Kwh

So, Energy Consumed in 30 days = 6*30/10
                                                       = 18 Kwh (units)

So, cost = 18*3.5 = 63 rs.

Answer 2

Answer:

I think

Explanation:

18 units is the right answer