Two rectangles L and M, not drawn to scale, overlap at N. N is the shaded area which is
12 of Rectangle L and
15 of Rectangle M. If the length of Rectangle L is 13 cm and its breadth is 2 cm, what is the area of the unshaded part of rectangles L and M?
| |
L |
M |
Difference |
| Total areas |
2 u |
5 u |
3 u |
| Shaded part |
- 1 u |
- 1 u |
|
| Unshaded parts |
1 u |
4 u |
3 u |
The overlapping shaded part of rectangles L and M is the same.
Area of Rectangle L
= 13 x 2
= 26 cm
2 Area of Rectangle L = 2 u
Area of Rectangle M = 5 u
2 u = 26
1 u = 26 ÷ 2 = 13
Area of unshaded parts of rectangles L and M
= 1 u + 4 u
= 5 u
= 5 x 13
= 65 cm
2 Answer(s): 65 cm
2 
