tolong jawab pliss pake cara buat besok

v.prisma=1/2×a×t×T
3600=120×T
T=3600 : 120
T=30

V = luas alas × tinggi prisma
3600 = (1/2 ×24 × 10) ×t
3600 = 120t
3600/120 = t
30 = t