Question

The area of a square field $65536{\text{m}}^2$. Find the cost of fencing it at the rate of Rs. $5$ per metre.

Answer 1

Area of square field $=65536$

$S^2=65536$

Fencing is along boundaries

So we want to find perimeter

$P=4s$

$\Rightarrow 4\sqrt{65536}$ $[\begin{array}{c}{s}^2=65536\\ s=\sqrt{65536}=256\end{array}$

$P=4\times 256=1024$m

Cost of fencing $\Rightarrow 1024\times 5=5,120$ Rs.