tolong jawab yah pleasee

16. Keliling alas = 4 x s
s = 40:4 = 10
LP kubus : 6 x s x s
6 x 10 x 10
D. 600 cm
17. p = 100 cm l = 25cm t = 20cm
v = p x l x t
v = 100 × 25 × 20
v = 50.000 cm = 50 liter