Two rectangles Z and A, not drawn to scale, overlap at B. B is the shaded area which is
17 of Rectangle Z and
19 of Rectangle A. If the length of Rectangle Z is 15 m and its breadth is 7 m, what is the area of the unshaded part of rectangles Z and A?
| |
Z |
A |
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 Z and A is the same.
Area of Rectangle Z
= 15 x 7
= 105 m
2 Area of Rectangle Z = 7 u
Area of Rectangle A = 9 u
7 u = 105
1 u = 105 ÷ 7 = 15
Area of unshaded parts of rectangles Z and A
= 6 u + 8 u
= 14 u
= 14 x 15
= 210 m
2 Answer(s): 210 m
2 
