дано c=300 000 км\с t=1с S\L- ?
L=2πR=6,28*6400=40192 км
S\L=300 000\40192=7,464
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дано c=300 000 км\с t=1с S\L- ?
L=2πR=6,28*6400=40192 км
S\L=300 000\40192=7,464