Question

if diameter of a circle is 42cm. find its area. all slove answer plz​

Answer 1

Step-by-step explanation:

d=42

r=d/2

r=21

area=πr^2

a=22/7*21*21

a=22*3*7

a=462cm^2

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Answer 2

Answer:

1386cm^2

Step-by-step explanation:

Given,

Diameter of the Circle = 42cm

Radius of the Circle = 21cm

$Now, \\ </p><p>Area \: of \: the \: Circle = \: \pi \: r {}^{2} \\ = \frac{22}{7} \times 21 \times 21 \\ = 22 \times 3 \times 21 \\ = 22\times 63 \\ = 1386cm {}^{2}$

Hope this will help you!!