InterviewSolution
Saved Bookmarks
| 1. |
The present age of Kalyani is 9 times her son's age. 11 years hence, the ratio of the ages of Kalyani and her son will be 12 : 5. Find the present age of Kalyani.1. 21yrs2. 25yrs3. 20yrs4. Could not be determined5. None of the above |
|
Answer» Correct Answer - Option 1 : 21yrs Given: Present age of Kalyani is 9 times her son’s age. 11 years hence, the ratio of the ages of Kalyani and her son = 12 : 5 Calculation: Let the present age of son be x ⇒ Present age of Kalyani be 9x ⇒ (x + 11)/(9x + 11) = 5/12 ⇒ 12(x + 11) = 5(9x + 11) ⇒ 12x + 132 = 45x + 55 ⇒ 45x – 12x = 132 – 55 ⇒ 33x = 77 ⇒ x = 77/33 ⇒ x = 7/3 Present age of Kalyani =9 × (7/3) years ⇒ 21 years ∴ Present age of Kalyani is 21 years |
|