Question

Yang nomer 20 pakai caranya yaaaaaaaaaaaaaaaaaaaaa

Answer 1

LP tabung = 2*phi*r*(r+t)0
= 2*r*(r+t)
= 2 x 5 (5 + 30) r = 5 & t=30
= 10 x 35 = 350phi

LP 1/2 bola = 2phi Rkuadrat
= 2 x Rk
= 2 x 5 x 5 = 50phi

jadi, 350 + 50 =400phi cm3 (b)