Find the area of circle of diameter $7 c m$ .

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Solution

Given that,
$d = 7 c m$
$∴ r = \frac{7}{2} = 3.5 c m$
$∴$ Area of circle $= π r^{2}$
$= \frac{22}{7} \times \frac{7}{2} \times \frac{7}{2}$
$= \frac{77}{2} c m^{2}$
$= 38.5 c m^{2}$
Then,
We get Area pf circle is $38.5 c m^{2}$ .

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Find the area of circle of diameter 7 cm.

Given that,d=7cm∴r=72=3.5cm∴ Area of circle =πr2=227×72×72=772cm2=38.5cm2Then,We get Area pf circle is 38.5cm2.

Find the area of circle of diameter $7 c m$ .

Given that,
$d = 7 c m$
$∴ r = \frac{7}{2} = 3.5 c m$
$∴$ Area of circle $= π r^{2}$
$= \frac{22}{7} \times \frac{7}{2} \times \frac{7}{2}$
$= \frac{77}{2} c m^{2}$
$= 38.5 c m^{2}$
Then,
We get Area pf circle is $38.5 c m^{2}$ .