Question

Five years ago, the average age of Shubham, Shreyash and Rishav is 20 years. After ten years from now, the average age of Shubham and Shreyash is 37.5 years. Find the present age of Rishav.

• A. 30 years
• B. 25 years
• C. 35 years
• D. 20 years

Answer 1

Answer:

D. 20 years

The average age of Shubham, Shreyash and Rishav (five years ago) = 20 years The average age of Shubham, Shreyash and Rishav (at present) = 20 + 5 = 25 years The sum of age of Shubham, Shreyash and Rishav (at present) = 25 × 3 = 75 years The average age of Shubham and Shreyash (after ten years) = 37.5 years The average age of Shubham and Shreyash (at present) = 37.5 - 10 = 27.5 years The sum of age of Shubham and Shreyash (at present) = 27.5 × 2 = 55 years The present age of Rishav = 75 - 55 = 20 years