7. | Six years ago, the ratio of the ages of Kunal and Sagar was 6 : 5. Four years hence, the ratio of their ages will be 11 : 10. What is Sagar’s age at present? | |||||||||||||||
Answer: Option A Explanation:
Let the ages of Kunal and Sagar 6 years ago be 6x and 5x years respectively.
10(6x + 10) = 11(5x + 10) 5x = 10 x = 2. Sagar’s present age = (5x + 6) = 16 years. |
8. | The sum of the present ages of a father and his son is 60 years. Six years ago, father’s age was five times the age of the son. After 6 years, son’s age will be: | |||||||
Answer: Option D Explanation:
Let the present ages of son and father be x and (60 –x) years respectively. Then, (60 – x) – 6 = 5(x – 6) 54 – x = 5x – 30 6x = 84 x = 14. Son’s age after 6 years = (x+ 6) = 20 years.. |
9. | At present, the ratio between the ages of Arun and Deepak is 4 : 3. After 6 years, Arun’s age will be 26 years. What is the age of Deepak at present ? | |||||||
Answer: Option B Explanation:
Let the present ages of Arun and Deepak be 4x years and 3x years respectively. Then, 4x + 6 = 26 4x = 20 x = 5. Deepak’s age = 3x = 15 years. |
10. | Sachin is younger than Rahul by 7 years. If their ages are in the respective ratio of 7 : 9, how old is Sachin? | |||||||||||||||
Answer: Option D Explanation:
Let Rahul’s age be x years. Then, Sachin’s age = (x – 7) years.
9x – 63 = 7x 2x = 63 x = 31.5 Hence, Sachin’s age =(x – 7) = 24.5 years. |
Discover more from aspirant corner
Subscribe to get the latest posts sent to your email.