(1)当a=2,h=3时,
V=a 2h=12;
S=2a 2+4ah=32;
(2)∵a 2h=12,2a(a+2h)=32,
∴h=
12
a 2 ,(a+2h)=
16
a ,
∴
2
a +
1
h =
2h+a
ah =
16
a
a
12
a 2 =
4
3 .
(1)当a=2,h=3时,
V=a 2h=12;
S=2a 2+4ah=32;
(2)∵a 2h=12,2a(a+2h)=32,
∴h=
12
a 2 ,(a+2h)=
16
a ,
∴
2
a +
1
h =
2h+a
ah =
16
a
a
12
a 2 =
4
3 .