Two rectangles K and L, not drawn to scale, overlap at M. M is the shaded area which is
17 of Rectangle K and
19 of Rectangle L. If the length of Rectangle K is 14 cm and its breadth is 3 cm, what is the area of the unshaded part of rectangles K and L?
| |
K |
L |
Difference |
| Total areas |
7 u |
9 u |
2 u |
| Shaded part |
- 1 u |
- 1 u |
|
| Unshaded parts |
6 u |
8 u |
2 u |
The overlapping shaded part of rectangles K and L is the same.
Area of Rectangle K
= 14 x 3
= 42 cm
2 Area of Rectangle K = 7 u
Area of Rectangle L = 9 u
7 u = 42
1 u = 42 ÷ 7 = 6
Area of unshaded parts of rectangles K and L
= 6 u + 8 u
= 14 u
= 14 x 6
= 84 cm
2 Answer(s): 84 cm
2 
