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power of each fan
(P)=120 w
=0.12kw
time duration,(T)=4hr
now we can calculate the electrical energy comsumed as,
energy comsumed =power× time
enery comsumed by 1 fan = 0.12×4kwh
= 0.48kwh
so, the energy comsumed by 5 fans
=0.48×5kwh
=2.4kwh
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