A house has 3 tube lights,2 fans,and aTV each tube light draws 40W, fan80W,
TV6OW. On average if all lights on for 5 hrs,fans 12hrs& tv 5hrs daily,find the
cost of electric energy used in 30 days @of 3/kWA.
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Answer:
total power = (40+80+60) w = 180 w/1000= 0.18 kwh
total time = (5+12+5) hr= 22hr
energy = power × time
= 0.18×22
= 18/100×22
= 396/100
cost of electricity for 30 days @ 3/kWh
energy × 3× 30
= 396/100×3× 30
= 3564/10
₹ 356.4
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