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A cfl bulb stays lit for 6000 hours.a normal bulb stays lit for 1000 hours.if 3 cfl bulbs are needed in a year then how many normal bulbs are needed in a year.?
A cfl bulb stays lit for 6000 hours.a normal bulb stays lit for 1000 hours.if 3 cfl bulbs are needed in a year then how many normal bulbs are needed in a year.?