Explanation
The formula to find the area of a square is: Side × Side. If each square has an area of 25, then each side of the square must be 5 (because \(5 \times 5=25\)). So the the dimensions of the rectangle are \(5 \times 10\). The perimeter is the sum of all the sides, and is therefore 5 + 10 + 5 + 10 = 30.