Question

Find the speed of an athlete who complete one lap of a circular track with radius 100 m in 1 minute

Answer 1

• The speed of the athlete is 10.47 m/s

Explanation:

Given:

The radius of the circular track is 100m

The athlete complete one lap of the circular track in 1 minute

So,

The athlete covers 1 circumference of the circular track.

Now,

The formula used to find the circumference of a circle is

= 2πr units.

Circumference of the circular field is

= 2 * 22/7 * 100

= 4400/7 cm = 628.57 cm

Now,

1 minute = 60 seconds

To find:

The speed of the athlete

We know that,

Speed = Distance/time

Now,

Speed of the athlete = 628.57/60

OR

Speed of the athlete = (4400/7) ÷ 60

Speed of the athlete = 10/47 m/s

Answer 2

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