1) 51 ÷ 17/20 = 51 × 20/17 = 60 см
2) 60 × 51 = 3060 см^2
Ответ: S = 3060 см^2
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1) 51 ÷ 17/20 = 51 × 20/17 = 60 см
2) 60 × 51 = 3060 см^2
Ответ: S = 3060 см^2