Dear Student,Given,P=120W, t=15min=15×60=900sEnergy consumed(In Joules) is,E=P×t=120×900=108,000J=108kJEnergy consumed(In KWh) is,E=P×t=1201000×9003600=12100×14=0 03KWhRegards

120 watt f or 15 min

D e a r S t u d e n t, G i v e n, P = 120 W, t = 15 m i n = 15 \times 60 = 900 s E n e r g y c o n s u m e d (I n J o u l e s) i s, E = P \times t = 120 \times 900 = 108, 000 J = 108 k J E n e r g y c o n s u m e d (I n K W h) i s, E = P \times t = \frac{120}{1000} \times \frac{900}{3600} = \frac{12}{100} \times \frac{1}{4} = 0.03 K W h R e g a r d s .

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