This figure is not drawn to scale. It is made up of 3 squares. The ratio of the area of the smallest square to the largest square is 1 : 7 while the shaded area is
310 of the unshaded area. What is the ratio of the shaded area to the area of the smallest square?
Smallest square |
Largest Square |
Shaded area |
Unshaded area |
7x13 |
13x7 |
1x13 |
7x13 |
3x7 |
10x7 |
13 u |
91 u |
21 u |
70 u |
The total area is repeated. Make the total area the same. LCM of 7 and 13 is 91.
Shaded area: Area of smallest square
21 : 13
Answer(s): 21 : 13