Answer:
81 sq.metre
Explanation:
So this shape is made up two geometrical shapes - Triangle and a Rectangle.
So we have to find the area of Rectangle and Triangle
Area of Rectangle =

If we apply this to the given diagram we get,

Now we have to find the area of Triangle
Area of Triangle =

If we apply this to the given diagram we get,

So the total area of the given figure is 60 + 21 which is equal to 81 sq.metre