If NEPA charges 5k per kWhr, what is the cost of operating for 24 hours a lamp required 1A on a 200v line?
A
24k
B
55k
C
40k
D
26k
E
32k
Verified Correct Answer: A.
Physical Principles & Numerical Solution
Energy (kWhr) = 1 x 200 x 24 x 10-3
= 4.8kWhr
1 kWhr. cost 5k
4.8kwhr. will cost (5 x 4.8)k
= 24 kobo
Source: Myschool Past Questions Archive (Record #29289)