Answer:
Let the height of the parallelogram be h. Then the area of the rectangle is:
A(rectangle) = length x width = 8 m x 4.5 m = 36 m^2
And the area of the parallelogram is:
A(parallelogram) = base x height = 6 m x h = 6h m^2
We are given that:
A(parallelogram) = 2 A(rectangle)
6h = 2(36)
6h = 72
h = 12
Therefore, the height of the parallelogram is 12 meters.
So, the area of the parallelogram is:
A(parallelogram) = base x height = 6 m x 12 m = 72 m^2
Hence, the area of the parallelogram is twice the area of the rectangle, as required.