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. , , — .
6 , .
, . 20 65 . , , ( 18 ).
? , . : 170 , 65 . , 65 : (1,7 * 1,7) = 22,5.
. — 19-25. — 19-24.
, , , , . .
: ( ), . – 0,85; – 0,65 — 0,85.
, — . , «», . .
— , — . = 50 + 0,75 ( — 150) + ( — 20) : 4
. , , .
40 : ( ) 110, 40 — ( ) 100.
, () , 10%, , () , 10%.
? .
, . 152,4 45 . ( 2,54 ) 152,4 900 . 10% .
- . .
, , .
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