Respuesta :

30*20-5*18
=600-90
=510
To find the area of the shaded region, we can find the area of the total region, then subtract the non shaded part.

Area of total region:
A = 20cm x 30cm = 600cm^2

Area of non-shaded region:
A = 5cm x 18cm = 90cm^2

Subtracting the non-shaded from the total region:
600cm^2 - 90cm^2 = 510cm&2.

Therefore, the answer is 4. 510cm^2