, . . , , . .

 

.

   

                   

- 8 .

 

3 1,5 720 / (12 18 40 /).


2 1,5 540 / (8 12 45 /)
 

1 2 400 / (4 8 50 /)

 

 

                                                                                   

                                                                        : , , .. 120 /.