Two rectangles K and L, not drawn to scale, overlap at M. M is the shaded area which is
12 of Rectangle K and
17 of Rectangle L. If the length of Rectangle K is 14 m and its breadth is 10 m, what is the area of the unshaded part of rectangles K and L?
| |
K |
L |
Difference |
| Total areas |
2 u |
7 u |
5 u |
| Shaded part |
- 1 u |
- 1 u |
|
| Unshaded parts |
1 u |
6 u |
5 u |
The overlapping shaded part of rectangles K and L is the same.
Area of Rectangle K
= 14 x 10
= 140 m
2 Area of Rectangle K = 2 u
Area of Rectangle L = 7 u
2 u = 140
1 u = 140 ÷ 2 = 70
Area of unshaded parts of rectangles K and L
= 1 u + 6 u
= 7 u
= 7 x 70
= 490 m
2 Answer(s): 490 m
2 
