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Kecepatan = 800m / 15 menit
= 53,3m / menit
t = 15 menit = 15 x 60 = 900 sekon
s = 0,2 km/putaran
dit : V ?
maka
s untuk 4 putaran = 0,2 x 4 = 0,8 = 800 m
v = s/t
= 800/900
= 0,88 m/s
atau :
v = 0,8/0,25
= 3,2 km/jm