Question

A square with area of 64 $c{m}^2$ has to be fenced across the boundary. Find the total cost of fencing if the rate of fencing is Rs.2 per metre.

• A. Rs. 32
• B. Rs. 64
• C. Rs. 108
• D. None of these

Answer 1

The correct option is B Rs. 64

Area of square = $(side{)}^2$.
Side length = 8 cm.
Total cost = perimeter $\times$ rate
$\Rightarrow$Total cost =(4 $\times$ 8)m $\times$ Rs.2/m
= Rs.64.