Question : The sum of two numbers is equal to 25 and their difference is 20. The ratio of the two numbers is:
Option 1: 9 : 1
Option 2: 7 : 9
Option 3: 3 : 5
Option 4: 2 : 7

Question

Question : The radii of two cylinders are in the ratio 3 : 4 and their heights are in the ratio 8 : 5. The ratio of their volumes is equal to:
Option 1: 9 : 10
Option 2: 8 : 9
Option 3: 9 : 11
Option 4: 7 : 10

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Answer 1

Correct Answer: 9 : 1

Solution : Given: The sum of two numbers is 25 and their difference is 20.
Let $n_{1},$ and $n_{2}$ be the two numbers.
$n_{1} = \frac{Sum + Difference}{2} = \frac{25 + 20}{2}$ = $\frac{45}{2}$
$n_{2} = \frac{Sum – Difference}{2} = \frac{25 - 20}{2}$ = $\frac{5}{2}$
So, the required ratio = $\frac{45}{2} : \frac{5}{2}$ = 9 : 1
Hence, the correct answer is 9 : 1.

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Question : The sum of two numbers is equal to 25 and their difference is 20. The ratio of the two numbers is:Option 1: 9 : 1Option 2: 7 : 9Option 3: 3 : 5Option 4: 2 : 7

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Question : The sum of two numbers is equal to 25 and their difference is 20. The ratio of the two numbers is:
Option 1: 9 : 1
Option 2: 7 : 9
Option 3: 3 : 5
Option 4: 2 : 7