What is the cost of running five 50W lamps and four 100W lamps for 10 hours if electrical energy costs 2 Kobo per KWh? by Sunday | Mar 25 | Physics JAMB | 0 comments A. N0.65 B. N0.39 C. N3.90 D. N0.13 Correct Answer: Option D = N0.13 Users Also Read These:A lamp marked 100W, 250V is lit for 10 hours. If it…A lamp rated 100W, 240V is lit for 5hours. Calculate…An electric lamp is rated 240V, 40W. What is the…A company has recently advertised an issue of one…Two similar cells are used to light two similar…