Question

find the area of a circular bathway whose outer radius is 32 cm and inner radius is 18 cm​

Answer 1

SOLUTION:-

Given:

A circular bathway outer radius is 32cm.

A circular bathway inner radius is 18cm.

To find:

The area of a circular bathway.

Explanation:

We know that, formula of the area of the circle is ;

=) πr²

Outer Area of the circular bathway:

$= > \frac{22}{7} \times 32 \times 32 \\ \\ = > \frac{22528}{7} {cm}^{2} \\ \\ = > 3218.28 {cm}^{2}$

&

Inner area of the circular bathway:

$= > \frac{22}{7} \times 18 \times 18 \\ \\ = > \frac{7128}{7} { cm}^{2} \\ \\ = > 1018.28 {cm}^{2}$

Now,

The area of the circular bathway:

Area of outer bathway- Ar. of Inner Bathway

=) 3218.28cm² - 1018.28cm²

=) 2200cm²

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