The dimensions of a rectangle are 51 m and 49 m respectively while side of a square is 50 m. Which of the following statements is correct ?

Answer: Option C

(A) Diagonal of the rectangle :
$$\begin{array}{rl}& =\sqrt{{\left(51\right)}^2+{\left(49\right)}^2}m\\ & =\sqrt{2601+2401}m\\ & =\sqrt{5002}m\end{array}$$
Diagonal of the square :
$$\begin{array}{rl}& =50\sqrt{2}m\\ & =\sqrt{5000}m\end{array}$$

(B) Diagonal of a square intersect at right angles but those of a rectangle do not.

(C) Perimeter of rectangle :
= 2(51 + 49) m
= 200 m
Perimeter of square :
= (4 × 50) m
= 200 m

(D) Area of rectangle :
= (50 × 50) m²
= 2500 m²