⇒ d_(1)*d_(2)=48
S_(1) (сеч.)=d_(1)*H ⇒ 30 = d_(1)*H
S_(2) (сеч.)=d_(2)*H ⇒ 40 = d_(2)*H
H=30/d_(1) и Н=40/d_(2)
30/d_(1) =40/d_(2)
40d_(1)=30d_(2)
Cистема
{d_(1)*d_(2)=48
{40d_(1)=30d_(2) ⇒ d_(1)=(3/4)d_(2)
(3/4)d^2_(2)=48
d^2_(2)=64
d_(2)=8
H=40/d_(2)=40/8=5
V=S(осн.)*Н=24*5=120
О т в е т. 120