В тонне 1000 кг
3/20=3*1000/20=3000/20=150 кг
P = 2 * ( X + Y )
92 = 2 * ( X + Y )
46 = X + Y ---> X = 46 - Y
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X \ Y = 3 \ 20 ---> 20X = 3Y
20 * ( 46 - Y) = 3Y
920 - 20Y = 3Y
23Y = 920 ---> Y = 40
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X = 46 - 40 = 6
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S = X * Y = 40 * 6 = 240
Б= 1, Е=9 , М=2 , У = 0 .
1+1999=2000 .