Explanation:
The area of a square is given by :
A = a²
Where
a is the side of the square
For square A, Area = 64 sq units
64 = a²
a = 8 units
For square B, Area = 30 sq units
30 = a²
a =
units
For square C, Side length = 14 units
A = 14²
A = 196 sq units
For square D, Side length =
units
A =
²
A = 30 sq units
Hence, this is the required solution.