1) 50*60*20 + 10*60*30 = 69000 см.кв.
2) 5*5*5 + 10*10*10 - 5*6*5 = 1025
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1) 50*60*20 + 10*60*30 = 69000 см.кв.
2) 5*5*5 + 10*10*10 - 5*6*5 = 1025