Question

Distance from place X to place Y is 45 metres and time taken by a person to cover this distance is 9 seconds. The speed of that person in km/h is: A) 18 km/h B) 5 km/h C) 9 km/h D) 20 km/h
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Answer 1

Answer:

distance=45m

time=9s

now,

speed=distance/time

=45/9

=5m/s

so,

5m/s=5x3.6km/h

=18km/h

Answer 2

the answer is 18 km/h