a. \(A=1042,6-1038,3=4,3\left(kWh\right)=4,3.10^3\left(Wh\right)\)\(A=UIt\Rightarrow I=\dfrac{A}{Ut}=\dfrac{4,3.10^3}{220.2}\simeq9,7A\)
b. \(T=A.1600=4,3.1600=6880\left(dong\right)\)
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