A person's men's hundred metres in first 40 second 80 metres in the next 40 seconds and 45m in the last 20 seconds what is the average speed

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Solution

Total distance covered = 100+80+45
= 225m
Total time taken = 40+40+20
=100sec
Average speed = total distance
covered/total time taken
=225/100
=2.25m/s

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