4. S=3360 cм2
5. S=995 cм2
V=1758 cм3
6. S=5118 cм2
V=22400 cм3
Объяснение:
4. S=P*h=4*20*42=3360 cм2
5. S=a*l*3/2+a²=22*
*3/2+22²=511+484= 995 cм2
l==15.5 cм
V=1/3S*h =1/3a²*
=1/3*484*10.9=1758 cм3
6. S=S₁+S₂+4S₃=40*40+20*20+4*(40+20)/2*26=5118 cм2
h₁=
=
= 26 cм
S₃=(a₁+a₂)/2*h₁
V=1/3h(S₁+
+S₂)=1/3*24(40²+
)+20²)=22400 cм3
