Объяснение:
12 : 1/6 = 72
30 : 0.75 = 40
(30+12):(0.75+1.66)=17.427км ч
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Объяснение:
12 : 1/6 = 72
30 : 0.75 = 40
(30+12):(0.75+1.66)=17.427км ч