How is the speed of 90 km/h expressed in m/s?
Step 1: Given data
Speed = 90km/h
Step 2: Converting km/h to m/s
We know that,
1hr=3600sec
1km=1000m
To convert 90km/h to m/s
90×10003600=25m/s
Therefore the answer is 25m/s.
The spot speeds (expressed in km/hr) observed at a road section are 66,62,45,79,32,51,56,60,53 and 49, the median speed (expressed in km/hr) is (Note: answer with one decimal accuracy)
A boy walks to his school at a distance of 6 km with constant speed of 2.5 km/hour and walks back with a constant speed of 4 km/hr. His average speed for round trip expressed in km/hr, is