Question : If the areas of two similar triangles are in the ratio 36 : 121, then what is the ratio of their corresponding sides?
Option 1: 6 : 11
Option 2: 11 : 5
Option 3: 6 : 5
Option 4: 5 : 12
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Correct Answer: 6 : 11
Solution : Given, The ratio of the area of two similar triangles = 36 : 121 If two triangles are similar, then the ratio of the area of both triangles is proportional to the square of the ratio of their corresponding sides. ⇒ $\frac{\text{(Area of triangle)}{_1}}{\text{(Area of triangle)}{_2}}=\frac{(\text{side}{_1})^2}{(\text{side}{_2})^2}$ ⇒ $\frac{\text{side}{_1}}{\text{side}{_2}}=\sqrt{\frac{\text{(Area of triangle)}{_1}}{\text{(Area of triangle)}{_2}}}$ ⇒ $\frac{\text{side}{_1}}{\text{side}{_2}}=\sqrt{\frac{36}{121}}$ ⇒ $\frac{\text{side}{_1}}{\text{side}{_2}}=\frac{6}{11}$ $\therefore \text{side}_{1} :\text{side}_{2}=6:11$ Hence, the correct answer is 6 : 11.
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Question : If the ratio of the altitudes of two triangles is 3 : 4 and the ratio of their corresponding areas is 4 : 3, then the ratio of their corresponding lengths of bases is:
Option 1: 1 : 1
Option 2: 16 : 9
Option 3: 1 : 2
Option 4: 2 : 1
Question : The ratio of areas of two circles is 81 : 121. What will be the ratio of their circumferences?
Option 1: 9 : 11
Option 2: 121 : 81
Option 3: 11 : 9
Option 4: 81 : 121
Question : 360 cm2 and 250 cm2 are the areas of the two similar triangles. If the length of one of the sides of the first triangle is 8 cm, then the length of the corresponding side of the second triangle is:
Option 1: $6\frac{1}{5}\;\operatorname{ cm}$
Option 2: $6\frac{1}{3}\;\operatorname{ cm}$
Option 3: $6\frac{2}{3}\;\operatorname{ cm}$
Option 4: $6\;\operatorname{ cm}$
Question : The ratio of the ages of two boys is 5 : 6. After two years, the ratio will be 7 : 8. Determine the ratio of their ages after 12 years.
Option 1: $\frac{22}{24}$
Option 2: $\frac{15}{16}$
Option 3: $\frac{17}{18}$
Option 4: $\frac{11}{12}$
Question : If the difference between the two numbers is 20 percent of their sum, then what is the ratio of larger number and smaller number?
Option 1: 6 : 5
Option 2: 5 : 4
Option 3: 4 : 3
Option 4: 3 : 2
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