Answer:
e) none of these
Step-by-step explanation:
Side of square = [tex]\sqrt{10^{2}+20^{2} } = \sqrt{100 + 400} = \sqrt{500} =10\sqrt{5} units\\Area of square =side * side \\= 10\sqrt{5} * 10\sqrt{5} = 10 * 10 * 5 = 500 sq.units\\[/tex]
