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1. A computer monitor uses 180 W in normal operation and 20 W in sleep mode. The computer is on all the 24 hours but is in sleep mode for 18 hours a days. The energy units saved in 30 days are
(A): 0.54 units
(B): 2.88 units
(C): 4.8 units
(D): 86.4 units
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By: guest on 01 Jun 2017 11.49 pm
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