Answer:
cost of incandescent light bulb for 10000 hour = $65
and cost of fluorescent bulb for 10000 hour = $19
Explanation:
Given data
incandescent bulb power = 60 W
incandescent light bulb cost = 50 ¢.
incandescent light bulb duration = 1000 hours
fluorescent bulb power = 15 W
fluorescent light bulb cost = $4.00
fluorescent bulb duration = 10,000 hours
electricity costs = $0.10/kWh
to find out
cost - purchase plus energy to obtain 10,000 hours of light
solution
first we find energy by fluorescent bulb and incandescent light bulb
energy = power × duration
energy = 60 × 1000 = 60 kWh ...........1........ incandescent light bulb
energy = 15 × 10000 = 150 kWh ..........2........ fluorescent bulb
and electricity cost that is $0.10 per kWh
so cost of incandescent light bulb of 60 kWh = 60 × 0.10 = $6 + $0.50 = $6.50 .............3
cost of fluorescent bulb of 150 kWh = 150 × 0.10 = $15 + $4 = $19 ...............4
so here we see that
cost of incandescent light bulb for 10000 hour = $6.50 × 10 = $65
and cost of fluorescent bulb for 10000 hour = $19
