An electric heater rated 800 W operates 6 h/day. Find the cost of energy to operate it for 30 days at ` 3.00 per unit.
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So, the electric heater is rated 800 W = 0.8 kW
it works for 6 hours a day.
so for 30 days: 6*30= 180 hours
energy produced in 30 days= (0.8*180)kWh=144kWh
kWh is the commercial unit of energy. so, 144 units.
cost per unit = 3 rs.
cost for 144 units = 144*3= rupees 432.
it works for 6 hours a day.
so for 30 days: 6*30= 180 hours
energy produced in 30 days= (0.8*180)kWh=144kWh
kWh is the commercial unit of energy. so, 144 units.
cost per unit = 3 rs.
cost for 144 units = 144*3= rupees 432.
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