tolong jawab ke-2 soal

12. Luas permukaan balok= 2 x ((pxl) + (pxt) + (lxt))
l = 60:6 = 10
p=80:10 = 8
2 x (80 + (8x6) + (10x6))
2x 188
= c. 376 cm2

13. V balok= p x l x t
=16 x 10 x 5
=c. 800 cm2