A bulb of power 400 W works for 8 hours daily. Calculate the total units of commercial electrical energy
consumed in 15 days.

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Solution

$D e a r S t u d e n t, G i v e n, P = 400 W P o w e r c o n s u m e d f o r 8 h o u r s p e r d a y i s, P_{d} = 400 \times 8 = 3200 W h = 3.2 K w h T o t a l p o w e r c o n s u m e d i n 15 d a y s i s, P_{t} = P_{d} \times 15 = 3.2 \times 15 = 48 K w h = 48 u n i t s R e g a r d s .$

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