Two rectangles K and L, not drawn to scale, overlap at M. M is the shaded area which is
16 of Rectangle K and
110 of Rectangle L. If the length of Rectangle K is 12 cm and its breadth is 10 cm, what is the area of the unshaded part of rectangles K and L?
| |
K |
L |
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 K and L is the same.
Area of Rectangle K
= 12 x 10
= 120 cm
2 Area of Rectangle K = 6 u
Area of Rectangle L = 10 u
6 u = 120
1 u = 120 ÷ 6 = 20
Area of unshaded parts of rectangles K and L
= 5 u + 9 u
= 14 u
= 14 x 20
= 280 cm
2 Answer(s): 280 cm
2 
