tolong dikerjaka a sampai c

Volume limas = 1/3 x Luas alas x tinggi

1.a
V = 1/3 x p x l x t
V = 1/3 x 20 x 15 x 18
V = 300 x 6
V = 1.800 cm³

1.b
V = 1/3 x s x s x t
V = 1/3 x 18 x 18 x 32
V = 6 x 18 x 32
V = 3.456 cm³

1.c
ukuran lebar alas tidak jelas