Question

An athlete completes one round of a circular track of diameter 200m in 40s.
Calculate the speed of the athlete

Answer 1

Answer:

15.7 m/s

Explanation:

Given:

• Diameter of the circular track = d = 200 metres
• Time taken to complete one round of the circular track = t = 40 seconds

To find:

• Speed of the athlete if the diameter of the circular track is 200 metres and time taken is equal to 40 seconds

Distance travelled by the athlete = circumference of the circular track

Radius = diameter/2

Radius = 200/2 = 100 metres

Circumference of the circular track = 2πr

Circumference of the circular track = 2×3.14×100

Circumference of the circular track = 628 metres

Time taken = 40 seconds

Speed = distance/time

Speed = 628/40

Speed = 15.7 m/s

The speed of the athlete is equal to 15.7 m/s