First of all, radius is half the diameter. Radius is from the center-most point of a circle straight to the edge.
Answer:
The area of the whole object is 1,237.68 m^2 (meters squared).
Explanation:
The circles are equal to:
π * d = a
3.14 * 12 = a
37.68 = a.
Now, since the circles are half in the rectangle, it would be easier to calculate the rectangle using these halves, so the total of the half-circles outside the rectangle is equivalent to a whole circle, or 37.68. Now, let's calculate the rectangle:
20 * (30 * 2) = a
20 * 60 = a
1200 = a.
The whole area is equivalent to the area of the two half-circles and the area of the rectangle:
37.68 + 1200 = a
1237.68 = a