Question

Convert speed=72km/he m/s

Answer 1

I km =1000m
72km=72000m
1hour= 60minute (1min=60seconds)
so, I hour = 60×60=3600seconds

72×1000/3600=20m/s

Answer 2

Let see your answer !!!!!

As we know that

1 km = 1,000 m

1 hour = 60 minutes

1 minute = 60 seconds

Hence ,

(72 × 1,0000/60 × 60) m/s

= 72,000 m/3,600 s

= 20m/s

$thanks$