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Find the circumference and area of a circle of radius 4.2 cm.

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Find the circumference and area of a circle of radius 4.2 cm.

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Given, 

Radius of circle = 4.2 cm 

Circumference of circle = 2πr 

= 2 x \(\frac{22}7\times4.2\)

= 26.4 cm 

Area of circle = 2πr2 

= \(\frac{22}7\times4.2\) x 4.2

= 55.44 cm2

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