Answer: 98 cm²
Explanation:
If two squares were placed side by side to create this rectangle, that means that the longer side is two times and long as the shorter side.
Assuming the length of the smaller side is x, the relevant equation would be:
2x + 2x + x + x = 42
6x = 42
x = 42 / 6
x = 7cm
Longer side is:
= 2 * 7
= 14 cm
Area of the squares = Length * Width
= 7 * 7
= 98 cm²