Q=I^2Rt
R=U/I
Q=IUt
t=Q/IU
t=237 600/3*220=360 (c)=6 (мин)
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Q=I^2Rt
R=U/I
Q=IUt
t=Q/IU
t=237 600/3*220=360 (c)=6 (мин)