6. Diketahui :
V = 3,75 m3
a = 200 cm = 2m
t = 1,5 m
L alas = 1/2 x 2 x 1,5
= 1,5 m2
t prisma = V : L alas
= 3,75
_______
1,5
= 2,5 m
7. Diketahui :
a = 60 cm
t = 40 cm
V = 12 liter
L alas = 1/2 x 60 x 40 = 1200 cm2
V air = 12 liter = 12 dm3 = 12.000 cm3
tinggi air = V air : luas alas