Two rectangles E and F, not drawn to scale, overlap at G. G is the shaded area which is
16 of Rectangle E and
19 of Rectangle F. If the length of Rectangle E is 10 cm and its breadth is 9 cm, what is the area of the unshaded part of rectangles E and F?
| |
E |
F |
Difference |
| Total areas |
6 u |
9 u |
3 u |
| Shaded part |
- 1 u |
- 1 u |
|
| Unshaded parts |
5 u |
8 u |
3 u |
The overlapping shaded part of rectangles E and F is the same.
Area of Rectangle E
= 10 x 9
= 90 cm
2 Area of Rectangle E = 6 u
Area of Rectangle F = 9 u
6 u = 90
1 u = 90 ÷ 6 = 15
Area of unshaded parts of rectangles E and F
= 5 u + 8 u
= 13 u
= 13 x 15
= 195 cm
2 Answer(s): 195 cm
2 
