The circumference of a circle is 440 cm .Find its radius and diameter.(take pictures =22/7)

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Solution

Circumference of the circle = 2πr = 440 cm

πr = 220

r = 220 × 7 / 22

r = 70 cm.

d = 2 × r = 2 × 70 = 140

Here π = 22/7 , r = radius of the circle , d = diameter of the circle

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