# An athlete completes a circular track of radius 70 meters in 20 s. The average velocity of the athlete is: *

## Answers

Answered by

4

## Given:-

- Radii of the track =
**7****0****m**

∴ Circumference of the track = **2****π****r**

[Let π = 22/7]

Circumference = 2 × 22/7 × 70 m = 2 × 22 × 10 m = 440 m

- Time taken to complete one Revolution =
**2****0****s**

**To**** ****Find****:****-**

Average speed of the athelete.

We know,

**Average**** ****Speed**** ****=**** ****(****TOTAL**** ****DISTANCE****)****/****(****TOTAL**** ****TIME****)**

Average speed = (2πr)/t = (440 m)/(20 s) = 22 m/s **(****Solution****)**

**@****I****m****p****e****r****i****u****s**

Answered by

2

**Answer is Zero.**

**Explanation: **It asked for avg. velocity, not avg. speed. It is a circular track which means displacement is zero. Therefore, Ans is 0

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