Question

The radius of a circular garden is 84m. inside it there is a 7 metre wide road along its circumference. find the area of this road​

Answer 1

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$\pi {r}^{2} \\ \\ \implies \frac{22}{ \cancel7} \times \cancel{ 84 }\times 84 \\ \\ \implies 22 \times12 \times 84 \\ \\ \implies \: 22176 \: \: \: \: \: \: \: \: \: \: \: \:$

Answer 2

Explanation:

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Radius of circular garden : 84 m

Width of the road along the circumference of the garden : 7 m

Remaining radii : 77 m

To find : Area of Road

=> Total Area of circular garden - Area of circular garden excluding the road

( 84 - TT ( 77)2

22/7 x 161 7

22 x 161

3542 m²

Answer : The required area of this road is

3542 m²