Question

21. The area of a circle is 49TT Cm2. Its circumference is (a) 71 cm (b) 14 TT cm (C) 21 T cm (d) 28 T cm​

Answer 1

Step-by-step explanation:

Solution:-

The are of a circle is given as: πr2

where r is the radius.

49π = πr2

Divide both sides by π

r2 = 49

Take the square root of both sides

r = 7

Circumference of a circle = 2πr

where r is the radius

Circumference = 2(π)(7)

= 14π

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