Tolong dijawabin yah nomer 8 dan 10 saja

8)
keliling roda B = pi  x d
keliling roda B = 22/7 x 35
keliling roda B = 110 cm = 1,1 m

banyak perputaran roda a = s / k = 220/ 1,1 = 200 kali

10)
L = 1/2 pi d1 + 1/2 pi d2 + d1 + d2
L = 1/2 x 22/7 x 14 + 1/2 x 22/7 x 7 + 14 + 7
L = 22 + 11+ 21
L = 54 cm