Find the circumference of circle having following radius (π = 22/7) (i) 21 (ii) 28 (iii) 10.5
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Answer:
(i) 132 cm , (ii) 176 cm , (iii) 66 cm
Step-by-step explanation:
(i) r = 21
circumference of a circle = 2πr
= 2×22/7×21
= 44 × 3
= 132 cm
(ii) r = 28
circumference of a circle = 2πr
= 2×22/7×28
= 44 × 4
= 176 cm
(iii) r = 10.5
circumference of a circle = 2πr
= 2×22/7×10.5
= 44 × 1.5
= 66 cm
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