Two rectangles L and M, not drawn to scale, overlap at N. N is the shaded area which is
16 of Rectangle L and
110 of Rectangle M. If the length of Rectangle L is 12 m and its breadth is 5 m, what is the area of the unshaded part of rectangles L and M?
| |
L |
M |
Difference |
| Total areas |
6 u |
10 u |
4 u |
| Shaded part |
- 1 u |
- 1 u |
|
| Unshaded parts |
5 u |
9 u |
4 u |
The overlapping shaded part of rectangles L and M is the same.
Area of Rectangle L
= 12 x 5
= 60 m
2 Area of Rectangle L = 6 u
Area of Rectangle M = 10 u
6 u = 60
1 u = 60 ÷ 6 = 10
Area of unshaded parts of rectangles L and M
= 5 u + 9 u
= 14 u
= 14 x 10
= 140 m
2 Answer(s): 140 m
2 
