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Question -

Find the circumference of the circles with the following radius. (Take π =22/7)
(a) 14 cm
(b) 28 mm
(c) 21 cm



Answer -

(a) Given: Radius (r) = 14 cm
∴ Circumference = 2πr = 2 ×(22/7) × 14
= 88 cm
(b) Given: Radius (r) = 28 mm
∴ Circumference = 2πr = 2 × (22/7) × 28
= 176 mm
(c) Given: Radius (r) = 21 cm
∴ Circumference = 2πr = 2 × (22/7) × 21
= 132 cm

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