Question

Express each of the following speed in km / h 45 m/s​

Answer 1

Answer:

1km = 1000m

1hr = 60×60s

=> 1km/hr = 1000m ÷ (60×60) s

=> 1km/h = (10/36) m/s

=> 1m/s = 3.6km/h

=> 45×1m/s = 45×3.6 km/ h

=> 162km/h

Answer 2

Answer:

1km=1000m

=>1m=1/1000km

Also, 1hr=60mins=60×60 s=3600s

=>1s= 1/3600 hr

So, 1m/s= (1/1000)km/(1/3600) hr=3.6km/hr

45m/s= 45×3.6 km/hr= 162 km/hr

Hope it helps :)