tolong donk kak,buat besok soalnya

(i)
K=2p+2.pi.r=2(28+(22/7x7))=100
(ii)
K=2r+1/4.2.pi.r=2(10)+1/2.3,14.10=35,7
(iii)
K=3s+1/2.2.pi.r=3(21)+22/7 . 10,5=96
(iv)
K=1/2.2.pi.R+2.pi.r=pi(R+d)
=3,14(10+10)=62,8