Question

A square has an area of $40000$ sq. metres. Find the cost of the fence round it at Rs.$2.80$ per $m^2$.

• A. Rs. $1540$
• B. Rs.$2250$
• C. Rs.$2240$
• D. Rs.$2500$

Answer 1

Answer: (C)

Rs.$2240$

Area $=x^2=40000\Rightarrow x=200m$

$\therefore$ Perimeter $=4\pi =800m$

$\Rightarrow$ Cost $=800\times 2.8=2240rs$