Question

The area of a circle is 38.5 cm². The circumference of the circle is a) 6.2cm b) 12.1cm c) 11cm d) 22cm​

Answer 1

Answer:

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Answer 2

Step-by-step explanation:

Area of a circle =πr2

∴38.5=πr2

∴722×r2=38.5

⇒r2=38.5×227

⇒r2=12.25⇒r=12.25

∴ r=3.5

Now, Circumference of circle =2πr

∴ Circumference of circle =2×722×1035

∴ Circumference of circle =22m