Question

A particle is moving in a circle of diameter 20 metre what is its
distance travelled in 3 rounds​

Answer 1

Answer:

d=20;. r=10

circumference=2πr

=2×3.14×10

= 62.8

for three round

=3×62.8

=188.4 ans.

Answer 2

Answer: 10 * 22/7 * 2 * 3 = 188.571428571

Explanation:

Circumfrence (C) = 2*pi*radius(diameter/2)

=  2 *  22/7 * 10

Rounds (R) = 3

Distance = C * R

= 2 *  22/7 * 10 * 3