A house has ten 40W and five 100W bulbs. How much will it cost the owner of the house to keep them lit for 10 hours if the cost of a unit is 5N?
-
A.
N90 -
B.
N50 -
C.
N45 -
D.
N5
Correct Answer: Option C
Explanation
P = 40 x 10 + 100 x 5
P = 400 + 500 = 900W
Cost = (frac{900 times 10 times 5}{1000})
Cost = N45
There is an explanation video available below.