Question

convert 200cm/min into km/hr

Answer 1

1 km=1000 m= 1000*100 cm so,1 cm =1/100000 km.
1hr=60 min
so 200 cm/min=(200)/60*100000=...
done.

Answer 2

200 cm/min into km/hr

200cm/min = 200/(60 × 100000)
= 1/30000km/hr