Bagaimana cara mengerjakan (dengan cara) please!

1)6 x s^2=96
S^2=96/6
S^2=16
S=4

2)2(PL+LT+TP)=500
2(15 . 4+4 . T+T . 15)=500
2(60+4T+15T)=500
2(60+19T)=500
120+38T=500
38T=380
T=10

3)CB=√ 20^2-16^2
=√ 400-256
=√ 144
=12 CM

V prisma= luas alas x tinggi
= 1/2 x 12 x 16 x 12
=1.152 cm^3

4) LP balok= 2(PL+LT+TP)
=2(12.6+6.8+8.12)
=2(72+48+96)
=2(216)
=432

5)V= luas alas x tinggi
238=34 x t
T= 7