Volume limas tersebut adalah?

sisi = 72 : 4 = 18 cm
t limas² = 15² - 9²
t limas² = 225- 81
t limas = √144 = 12

v limas = 1/3 x L alas x t
v limas = 1/3 x 12 x 12 x 12 = 576 cm^3

V = ⅓ × la × t
⅓ × 18² × 12
⅓ × 324 × 12
= 1296 (d)

t = 12 dari,
√15² - 9²
√225 - 81 = √144 = 12