Answer:
area of shaded = 331 square meters
Explanation:
area of rectangle : length * width
so area of shaded = ( 21 * 11 ) + 5 * ( 21 - 5 ) + 5 * 4 = 331 square meters
OR,
find the full square are = 21 * 21 = 441 square meters
then find unshaded area which is = 5 * 5 + 5 * 17 = 110 square meters
so area shaded is = 441 - 110 = 331 square meters