Two rectangles F and G, not drawn to scale, overlap at H. H is the shaded area which is
14 of Rectangle F and
16 of Rectangle G. If the length of Rectangle F is 5 m and its breadth is 4 m, what is the area of the unshaded part of rectangles F and G?
| |
F |
G |
Difference |
| Total areas |
4 u |
6 u |
2 u |
| Shaded part |
- 1 u |
- 1 u |
|
| Unshaded parts |
3 u |
5 u |
2 u |
The overlapping shaded part of rectangles F and G is the same.
Area of Rectangle F
= 5 x 4
= 20 m
2 Area of Rectangle F = 4 u
Area of Rectangle G = 6 u
4 u = 20
1 u = 20 ÷ 4 = 5
Area of unshaded parts of rectangles F and G
= 3 u + 5 u
= 8 u
= 8 x 5
= 40 m
2 Answer(s): 40 m
2 
