Question

the perimeter of a circle is 198cm, find its radius​

Answer 1

Answer:

Circumference of the circle is 198 cm.

Circumference of a circle = 2πr

Circumference = 2 × π × r

198 = 227 × 2 × r                                     (Taking π=227)

r = 31.5 cm

d = 2 × r

= 63 cm

∴ Radius of the circle is 31.5 cm.

Diameter of the circle is 63 cm.

Answer 2

Answer:

31.5

Step-by-step explanation:

Perimeter of circle = 2πr, or 2 x 22/7 x r

Perimeter given = 198 cm

Therefore, 2 x 22/7 x r = 198 cm

                = r x 44/7 = 198 cm

                  r x 44 = 1386

                   r = 1386/44

                   = 31.5