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?
Power= 60 Watt Everyday Use = 10 Hours Total Days= 30 Cost Of elctricity per unit= 3.50 Rs. Find:- Total amount to be paid in 30 days Given:- The days can be calculated in total hours used in 30 days Hence, Days x Everyday Use = 30 x 10 = 300 Hours Convert, 60 Watt into Kwatt = 60/1000 By Formula, Unit= Kwatt x Time (in hours) U= 60/1000 x 300 U= 18 Hence, total unit used is 18. By Formula, Cost= Unit x Rupees per unit Cost= 18 x 3.50 Cost= 63 Rupees Therefore, the amount to pay in 30 days is 63 Rupees.
