Two rectangles N and P, not drawn to scale, overlap at Q. Q is the shaded area which is
14 of Rectangle N and
19 of Rectangle P. If the length of Rectangle N is 4 cm and its breadth is 3 cm, what is the area of the unshaded part of rectangles N and P?
|
N |
P |
Difference |
Total areas |
4 u |
9 u |
5 u |
Shaded part |
- 1 u |
- 1 u |
|
Unshaded parts |
3 u |
8 u |
5 u |
The overlapping shaded part of rectangles N and P is the same.
Area of Rectangle N
= 4 x 3
= 12 cm
2 Area of Rectangle N = 4 u
Area of Rectangle P = 9 u
4 u = 12
1 u = 12 ÷ 4 = 3
Area of unshaded parts of rectangles N and P
= 3 u + 8 u
= 11 u
= 11 x 3
= 33 cm
2 Answer(s): 33 cm
2