Two rectangles A and B, not drawn to scale, overlap at C. C is the shaded area which is
15 of Rectangle A and
17 of Rectangle B. If the length of Rectangle A is 5 m and its breadth is 3 m, what is the area of the unshaded part of rectangles A and B?
| |
A |
B |
Difference |
| Total areas |
5 u |
7 u |
2 u |
| Shaded part |
- 1 u |
- 1 u |
|
| Unshaded parts |
4 u |
6 u |
2 u |
The overlapping shaded part of rectangles A and B is the same.
Area of Rectangle A
= 5 x 3
= 15 m
2 Area of Rectangle A = 5 u
Area of Rectangle B = 7 u
5 u = 15
1 u = 15 ÷ 5 = 3
Area of unshaded parts of rectangles A and B
= 4 u + 6 u
= 10 u
= 10 x 3
= 30 m
2 Answer(s): 30 m
2 
