tolong no 40 dgn cara ya

Lp = L alas + jumlah L sisi tegak
2400 = (s x s) + (½ . a . t∆ . 4)
2400 = (30 . 30) + (½ . 30 . t∆ . 4)
2400 = 900 + (60 . t∆)
2400 - 900 = 60 . t∆
1500 = 60 . t∆
t∆ = 1500/60
t∆ = 25cm

TO² = t∆² - (½PQ)²
= 25² - 15²
= 625 - 225
= 400
TO = √400
= 20cm

V = ⅓ . L alas . t
= ⅓ . 900 . 20
= 6000cm³

semoga membantu