Question : The ratio of the present ages of Ram and Ramesh is 3 : 5. After 7 years the ratio of their ages will be 4 : 5. Find the present age of Ramesh.
Option 1: 5 years
Option 2: 15 years
Option 3: 7 years
Option 4: 12 years
Correct Answer: 7 years
Solution :
Let the present age of Ram and Ramesh be $3x$ and $5x$.
According to the question,
After 7 years,
$\frac{3x+7}{5x+7}=\frac{4}{5}$
⇒ $15x + 35 = 20x + 28$
⇒ $35 - 28 = 20x - 15x$
⇒ $5x = 7$
⇒ $x = \frac{7}{5}$
So, the present age of Ramesh $= 5 × \frac{7}{5}=7$ years
Hence, the correct answer is 7 years.
Related Questions
Know More about
Staff Selection Commission Combined Grad ...
Result | Eligibility | Application | Selection Process | Preparation Tips | Admit Card | Answer Key
Get Updates Brochure
Your Staff Selection Commission Combined Graduate Level Exam brochure has been successfully mailed to your registered email id “”.
