Question

find the diameter of a circle whose circumference is 66 metre​

Answer 1

solution

$2 \: \pi \: r = 66 \\ = > 2r = 66 \times \frac{7}{22} \\ = > 2r = d = 21 \: \: m$

Answer 2

Answer:

21

Step-by-step explanation:

2πr = circumference

2πr= 66

πr=33

r=33×7/22

r=10.5

d= 21