Answer: Option C
(A) Diagonal of the rectangle :
$$\eqalign{
& = \sqrt {{{\left( {51} \right)}^2} + {{\left( {49} \right)}^2}} m \cr
& = \sqrt {2601 + 2401} \,m \cr
& = \sqrt {5002} \,m \cr} $$
Diagonal of the square :
$$\eqalign{
& = 50\sqrt 2 \,m \cr
& = \sqrt {5000} \,m \cr} $$
(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