Question

calculate the area of the circular pathway formed by two concentric circles having the following radii= R=20, r=6cm

Answer 1

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Answer 2

As we know the formula is
$\pi {r}^{2}$
So area of the 1st circle we have
$\pi {20}^{2}$
Which is 400π
And similarly area of 2nd one is 36π
Now the area of circularpathway is
364π - 36π = 364π