Question

The area of a square plot is $784{\text{m}}^2$. The side of the square is

• A. 38 m
• B. 32 m
• C. 28 m
• D. 21 m

Answer 1

The correct option is C

28 m

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

Area of square is $a^2$

$\therefore a^2=784$

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

$a=2\times 2\times 7$

$a=28\text{m}$