5. ( ) Q
, (3)
/. (4)
, ,
/. (5)
/ . "" , , /.
/.
, 2 h2``,
.
/,
h = ×t = 4,19×60 = 251,2 / .
Q , D ,
, (6)
- , :
, (7)
h1 = ×t1 = 4,19×54 = 226,3 / ;
h2 = ×t2 = 4,19×73 = 305,9 / ;
h = ×t = 4,19×5 = 21,0 / .
/.
.
/ =23,79 .
/ =39,97 .
Do
/.
()
311 % . , /.
/.
( ) .