2.
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| 506.3 |
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| 2667.1 |
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| 4.23 |
-
=300, = 600, = 3, : h=14,05, b =27.6 .
58,8 20 . : 1 = (10+10) =300-20= 280, 1=-21,9-10=561.8. . . , : 
. : n = 206: h = 165:14,05 = 11 . :L= ( 1)27,6=1027,6=276 .
( ) , , () .
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=141,9 ( 1 )
10. :
= 135 .
.
27000, 6 1200 5093. : 1200×6+5093=12293. , . . : 27000 - 12293=14707. , : 14707/10= 1470.
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