Question

using the formula D =2 R C = 2 NR or C =nd find the values of unkowm variable c=198cm r? d? c=62.80cm ,take n=3-14 d=? r? ​

Answer 1

Answer:

$\mathbb\blue{Circumference = }$$\mathbb\purple{198 cm}$

Radius

=$\frac{7}{22}\times 2\times 198$

= $31.5 cm$

$\therefore{D = 2×31.5 cm}$

=$63cm$