Question

The area of a square plot is 1225 $m^2$. What is the length of its side?

• A. 55 m
• B. 35 m
• C. 45 m
• D. 25 m

Answer 1

The correct option is B

35 m

Let the side of square plot be ${}^{\prime }{a}^{\prime }$

Area of plot will be equal to $a^2$

$\therefore a^2=1225$

$a=\sqrt{1225}$

$a=\sqrt{5\times 5\times 7\times 7}$

$a=\sqrt{5^2\times 7^2}$

$a=5\times 7$

$a=35\text{m}$