Jawabanmu

2014-09-10T21:01:39+07:00
Luas = 3,14 x 15 x 15 x 60 x 2 + 3,14 x 30 =
        = 70,65 x 60 x 2 + 94,2
        = 70,65 x 120 + 94,2
        = 8568 + 94,2
        = 8662,2 cm2
2014-09-10T21:02:13+07:00
K= 2x3.14x15 =94.2 Lp= 94.2x60 = 5,653 cm