Question

Time- 50sec, distance-100m. find speed​

Answer 1

Answer:

speed=dist./time

speed=100/50

speed=50m/s

Answer 2

Answer:

100 m = 0.1 km

So, he goes 1 kilometre in 500 seconds

An hour is 3600 seconds

So, in an hour, he goes 1 km x 3600 s / 500 s

Or 1 km x 7200 s / 1000 s

So, he travels 7.2 km / h

Footnotes: It is not regarded as good form to mix units and symbols (km / hour)