Question

What will be the cost of fencing a circular garden of radius 28 m at the rate of RSS 45 per meter

Answer 1

Answer:

$cost \: of \: fencing \: the \: garden \: will \: equal \: to \: = 2\pi \: r \: \times 45 \: rupees \: \\ \\ \\ = 2 \times\pi \times 28 \times 45 = 7920 \: rupees \:$

Answer 2

Given,

The radius of the circular garden in meters$\[ = 28\]$

The rate of fencing per meter$\[ = 45\]$

Solution,

Formula used, The perimeter of a circle$\[ = 2\pi r\]$

So, the perimeter of the circle is

$\[\begin{array}{l} = 2 \times \frac{{22}}{7} \times 28\\ = 2 \times 22 \times 4\\ = 176\end{array}\]$

Therefore, the total cost of fencing the garden

$\[\begin{array}{l} = 176 \times 45\\ = 7920\end{array}\]$

Hence, the total cost of fencing the garden is Rs $\[7920.\]$