Question

A piece of square land has a perimeter equal to 20 m. A cow is standing in the middle of the square land as shown in the figure. What is the minimum distance the cow has to travel in order to go out of the field and drink water?

• A. 5 m
• B. 2.5 m
• C. 4 m
• D. 20 m

Answer 1

The correct option is B

2.5 m

Given, perimeter of a square land = 20 m
Perimeter of a square = 4 $\times$ Side of the square
$\therefore$ 20 = 4 $\times$ side
$\Rightarrow$ Side = $\frac{20}{4}$
= 5 m
$\because$ Cow is standing at centre of the square, in order to go out it has to travel the length equal to half of the side =$\frac{5}{2}$
= 2.5 m