nomor satu tolong di bantu ya

Kll lingkaran = 2.[tex] \frac{22}{7} [/tex].7
                     = 44 cm

1 putaran = 44 + 20 + 20
                = 84 cm

s = 10 putaran = 10.84 = 840 cm

t = 20 menit = 1200 detik

v = [tex] \frac{s}{t} [/tex]
   = [tex] \frac{840}{1200} [/tex]
v  = 0,7 m/s