In a household 5 tubelight of 40 watt each are used for 5 hours and an electric iron of 500 watt for 4 hours everyday. Calculate the total energy consumed for the month of September and also find the total cost of operating each unit cost Rs 4.
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Explanation:
5 bulbs of 40W each used for 5hr : 5*40w*5/1000
therefore 5*40*5/1000= 1000/1000=1kwh
electric press for 4 hr and 500w : 4*500*1/1000=2kwh
total energy for 30 days : 1*30 =30 units for bulbs
total energy for electric press for 30 days :2*30=60 units
total energy = 30+60=90units
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