Question

Circumfrence of a circle is 62cm. Find its radius and diameter

Answer 1

diameter =20 cm

radius =10cm

Use the formula:

Circumference =pi×d(diameter)

62cm=22/7d

divide both sides by the reciprocal of 22/7

7/22×62=22/7d×7/22

this gives you 20cm(rounded off)as the diameter then the radius is 10cm ; 20÷2 which is 10