Question

. Length of a park is 25 m and breadth is 20 m. The park is surrounded by a wire. If the wire is fold into a circle, find the diameter of that circle.

Answer 1

$length = 25m \\ width = 20m \\ \\ perimeter \: of \: rectangle = circumference \: of \: circle \\ 2(l + b) = 2\pi \: r \\ 2(25 + 20) = 2\pi \: r \\ 90 = 2\pi \: r \\ r = \frac{45}{\pi}$
then diameter will be 2r
$2 \times \frac{45}{\pi} \\ = \frac{90}{\pi} ans.$

Answer 2

Answer:

length=25m

width=20m

perimeterofrectangle=circumferenceofcircle

2(l+b)=2πr

2(25+20)=2πr

90=2πr

r=

π

45

then diameter will be 2r

\begin{gathered}2 \times \frac{45}{\pi} \\ = \frac{90}{\pi} ans.\end{gathered}

2×

π

45

=

π

90

ans.