Question

A sprinter travels a distance of 200 m in a time of 21.06 seconds.
What is the sprinter's average speed rounded to 4 sf?

Answer 1

Answer:

Distance travelled by sprinter = 100 m

Time taken = 9.83 sec

∵speed = distance/time taken

= 100/9.83

= 10.17 m/s

Now we know, 1 km/h = 1000/3600 m/s

so, 1 m/s = 3600/1000 km/h = 18/5 km/h

∴ 10.17 m/s = 10.17 × 18/5 = 10.17 × 18/5 = 36.612 km/h

Hence, average speed = 36.612 km/h

Answer 2

Step-by-step explanation:

9.496m/s

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