Question

if radius 7cm then find its diameter and circumference

Answer 1

Radius of a circle = 7cm

Diameter of a circle = 2*Radius = 2 * 7 = 14cm

Circumference of a circle = 2πr = 2 * 22/7 * 14 = 2 * 22 * 2 = 88 cm

Answer : Diameter = 14 cm; Circumference = 88 cm

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Answer 2

radius=7
then diameter will be 7×2=14
because diameter is always double of radius
circumference = pie ×diameter
= 3.14×14
= 43.96