Nomer 30 kak sama caranya yaaa

selisih a-b = 28-10 = 18 cm
alasΔ = 18 : 2 = 9 cm
tinggi trapesium
=√15²-9²
=√225-81
=√144= 12cm
Volume = Luas alas x tinggi prisma
= 1/2 (a + b) t x T
= 1/2(10+28) 12 x 20
= 4.560 cm²