Answer:
Third option is correct. The area of figure is 21.25m^2.
Explanation:
The area of a kite is

Both diagonals are perpendicular. Longer diagonal bisects the smaller diagonal.
In triangle ABO,



The length of BD is

The length of AC is

The area of kite ABCD is



Therefore third option is correct. The area of figure is 21.25m^2.