Subject: General Aptitude · Chapter: Problems on Ages · Exam: · Marks: · Difficulty:
Ratio between the ages of Subhash, Prasad and Amar is 3 : 6 : 7. If the difference between the ages of Prasad and Amar is 10 years, then what is the difference between the ages of Subhash and Prasad? (Railways, 2006)
(a)5 years
(b)10 years
(c)20 years
(d)30 years
Answer
Answer (as printed): D
Explanation
Let Subhash's age be $3x$ years. Then, Prasad's age $=6x$ years and Amar's age $=7x$ years. $\therefore 7x-6x=10 \Rightarrow x=10$. Required difference $=(6x-3x)$ years $=3x$ years $=(3\times10)$ years $=30$ years.
Explanation as extracted from the printed page; notation may be imperfect.