Find the cost of running a 60W lamp for 24 hours. If 1kW hr cost 5 naira
A
14.4 naira
B
12.5 naira
C
7.2 naira
D
2.0 naira
Verified Correct Answer: C.
Physical Principles & Numerical Solution
Cost = P(Kwh) x Cost per KW
= \(\frac{60 \times 24}{1000} \times N5 = N7.2\)
Source: Myschool Past Questions Archive (Record #34396)