Calculate the running costs of a filament lamp with a 60 W bulb and a CFL lamp with a 15 W bulb for 15 hours.
1 kWh costs 10p.
cost = power (kW) × time (hours) × price (per kWh)
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Answer:
energy consumed by filament lamp in one hour is equal to 60 watt
energy consumed by CFL lamp in one hour is equal to 15 watt
energy consumed by filament lamp in 15 hour is equal to 15 into 60 watt
i.e.=900w
energy consumed by CFL lamp in15 he
=15*15=225w
total energy consumed by both the bulb is225w+900w=1125w
in kilowatt is equal to 1125/1000kw
=1.125
cost of 1 kilowatt is equal to 10 paise
therefore cost of 1.125 kilowatt is equal to 1.125*10
=Rs11.25
Please make my answer Brainlist.
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