Two rectangles A and B, not drawn to scale, overlap at C. C is the shaded area which is
18 of Rectangle A and
110 of Rectangle B. If the length of Rectangle A is 8 cm and its breadth is 4 cm, what is the area of the unshaded part of rectangles A and B?
| |
A |
B |
Difference |
| Total areas |
8 u |
10 u |
2 u |
| Shaded part |
- 1 u |
- 1 u |
|
| Unshaded parts |
7 u |
9 u |
2 u |
The overlapping shaded part of rectangles A and B is the same.
Area of Rectangle A
= 8 x 4
= 32 cm
2 Area of Rectangle A = 8 u
Area of Rectangle B = 10 u
8 u = 32
1 u = 32 ÷ 8 = 4
Area of unshaded parts of rectangles A and B
= 7 u + 9 u
= 16 u
= 16 x 4
= 64 cm
2 Answer(s): 64 cm
2 
