Two rectangles J and K, not drawn to scale, overlap at L. L is the shaded area which is
12 of Rectangle J and
16 of Rectangle K. If the length of Rectangle J is 13 m and its breadth is 4 m, what is the area of the unshaded part of rectangles J and K?
|
J |
K |
Difference |
Total areas |
2 u |
6 u |
4 u |
Shaded part |
- 1 u |
- 1 u |
|
Unshaded parts |
1 u |
5 u |
4 u |
The overlapping shaded part of rectangles J and K is the same.
Area of Rectangle J
= 13 x 4
= 52 m
2 Area of Rectangle J = 2 u
Area of Rectangle K = 6 u
2 u = 52
1 u = 52 ÷ 2 = 26
Area of unshaded parts of rectangles J and K
= 1 u + 5 u
= 6 u
= 6 x 26
= 156 m
2 Answer(s): 156 m
2