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b)120[m/min]=120 * (1/60) = 2 [m/s]
c) 3[km/min]= 3 * (1/ 1/60) = 180 [km/h]
120 m/min =120 × 1/60 = 2m/s
3km/min = 3 × 1/ 1/60 = 3/1 × 60/1 = 180km/h
b)120[m/min] = 2 [m/s]
c) 3[km/min] = 180 [km/h]