$A$ father's age is three times the sum of the ages of his two children,but $20 \, \text{years}$ hence his age will be equal to the sum of their ages. Then,the father's age is (in $\text{years}$)

The ratio between the present ages of Ram and Rakesh is $6:11$. $4$ years ago,the ratio of their ages was $1:2$. What will be Rakesh's age after $5$ years? (in years)

The ratio between the present ages of $Ram$,$Rohan$,and $Raj$ is $3: 4: 5$. If the average of their present ages is $28$ years,then what will be the sum of the ages of $Ram$ and $Rohan$ together after $5$ years? (in 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)?

The ratio between the present ages of $P$ and $Q$ is $6:7$. If $Q$ is $4 \text{ years}$ older than $P$,what will be the ratio of the ages of $P$ and $Q$ after $4 \text{ years}$?

The ratio between the ages of Arun and Deepak at present is $4:3$. After $6$ years,Arun's age will be $26$ years. What is the age of Deepak at present? (in years)