Question

A body completes 2 rounds on a circular track of radius 7m in 10 seconds .
calculate:
a. distance covered.
b. speed (take pie=22/7)

Answer 1

Explanation:

Distance covered by the body = Circumference of the circle.

We know circumference of the circle is 2πr

We have, r = 7m

Taking π = 22/7

Circumference is :-

= 2 × 22/7 × 7

= 44m

Since, It covered 2 rounds

Total distance = 44 × 2 = 88

So the body completes 88m in 10s

Then,

Speed = 88 ÷ 10

= 8.8m/s