Three times the present age of a father is equal to eight times the present age of his son. $8$ years hence,the father will be twice as old as his son at that time. What are their present ages?

The ratio of the present age of Manoj to that of Wasim is $3:11$. Wasim is $12 \text{ years}$ younger than Rehana. Rehana's age after $7 \text{ years}$ will be $85 \text{ years}$. What is the present age of Manoj's father,who is $25 \text{ years}$ older than Manoj? (in $\text{years}$)

The average age of $11$ players of a cricket team is increased by $2$ $months$ when two of them aged $18\, years$ and $20\, years$ are replaced by two new players. The average age of the new players is:

The sum of the ages of $4$ members of a family,$5$ $years$ ago,was $94$ $years$. Today,when the daughter has been married off and replaced by a daughter-in-law,the sum of their ages is $92$ $years$. Assuming that there has been no other change in the family structure and all the people are alive,what is the difference between the age of the daughter and that of the daughter-in-law? (in $years$)

Ratio of the ages of Tania and Rakesh is $9:10$. $10 \text{ years}$ ago,the ratio of their ages was $4:5$. What is the present age of Rakesh (in $\text{years}$)?

Shan is $55$ years old. Sathian is $5$ years junior to Shan and $6$ years senior to Balan. The youngest brother of Balan is Devan,and he is $7$ years junior to him. What is the age difference between Devan and Shan (in years)?