Question

A circular pond of diameter 40 metres is surrounded by a grass path 5 metres wide. find the area of this path. (take π = 22/7)

Answer 1

area including grass path =
$\pi \times 25 \times 25$
area excluding grass path=
$\pi \times 20 \times 20$
area of grass path =
$\pi(625 - 400)$
=
$225\pi$
=
$\frac{225 \times 22}{7}$
=707.14

Answer 2

Heya!!

Here's your answer !!

The radius of the inner circle, which is a pond, is 20 m and the radius of the outer circle is 20m + 5m, i.e., 25 m, as it includes the path.

we have to find the area of the path, i.e., of the annulus thus made.

Area of the path = πR² - πr²

= π (R + r) ( R - r)

= 22/7 (25 + 20) (25 - 20) m

= 22/7 × 45 × 5 = 4950/7

= 707.14 m²

Glad help you
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@vaibhavhoax
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