One kW. H electric energy can supply the normal working time of the fluorescent lamp marked with 220 V and 40 W

One kW. H electric energy can supply the normal working time of the fluorescent lamp marked with 220 V and 40 W

Answer: 25 hours
Analysis:
P=W/t,W=1kw·h,P=40W=0.04kw
T = w / P = 1kW · H / 0.04kw = 25h
That is: 25 hours