Answer:

find the area of a trapezium, you can use the formula:

Area = (sum of parallel sides) * (distance between them) / 2

In this case, the parallel sides are 20m and 30m, and the distance between them is the average of the non-parallel sides, which is (6m + 8m) / 2 = 7m.

Plugging these values into the formula, we get:

Area = (20m + 30m) * 7m / 2

= 50m * 7m / 2

= 350m^2 / 2

= 175m^2

Therefore, the area of the trapezium is 175 square meters.