a bulb rated 40 watt 220 volt is used for one day find the cost in 30 days if 10 rs is the cost for 1 unit
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given,
p=40w
v=220v
t=1day=24hrs.
therefore for 30days=30×24=720hrs.
A/Q,
E=Pt
E=0.04×720
Therefore, energy consumed=28.8kWh or 28.8unit
Since,cost of 1 unit=Rs.10
therefore,cost of 28.8 unit=10×28.8=288
hence,the cost of using electricity in 30days=Rs.288.00
p=40w
v=220v
t=1day=24hrs.
therefore for 30days=30×24=720hrs.
A/Q,
E=Pt
E=0.04×720
Therefore, energy consumed=28.8kWh or 28.8unit
Since,cost of 1 unit=Rs.10
therefore,cost of 28.8 unit=10×28.8=288
hence,the cost of using electricity in 30days=Rs.288.00
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