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…Two radioactive elements Q and S have half-life…A house has ten 40W and five 100W bulbs. How much…The cost of running five 60 W lamps and four 100 W…Find the cost of running a 60W lamp for 24 hours. If…