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 8 cm and its breadth is 7 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
= 8 x 7
= 56 cm
2 Area of Rectangle N = 4 u
Area of Rectangle P = 9 u
4 u = 56
1 u = 56 ÷ 4 = 14
Area of unshaded parts of rectangles N and P
= 3 u + 8 u
= 11 u
= 11 x 14
= 154 cm
2 Answer(s): 154 cm
2