find the circumference of the circle whose diameter is :
(1) 21.7 cm
(2) 70 cm
please solve
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2. Circumference of the circle =2πr
Diameter (d) = 70 cm
Radius= d/2
Circumference of the circle = 2πr
=2×22/7×70/2
=3080 ÷14
=220
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