Jawabanmu

2014-04-29T18:47:47+07:00
Luas permukaan= luas alas + keliling alas x tinggi
= 12x16:2 + (12+16+20) x 17.5
= 96 + (48x17.5)
= 96 + 840
= 936 cm2
2014-04-29T19:03:22+07:00
2 x La x t
2 x a x t/2 x t
2 x 12 x 16/2 x 17,5
3360