A sum of 12600 is to be distributed between Aditya, Balram and Chetan. For every rupee Aditya gets, Balram gets 80p and for every rupee Balram gets, Chetan get 90 paise. Find the amount get by Chetan.

Speed of a boat along with the current and against the current are $12$ km/hr and $6$ km/hr respectively. What is the speed of the boat (in km/hr) in still water?

Quantity $1$: Ratio between the speed of the boat in still water to the speed of the stream is $2:1$. Total time taken by a man to cover distance of $72$ km in upstream and comeback is $32$ hours. Find downstream speed.

Quantity $2$: $9$ $9 \mathrm{km}/\mathrm{h}$.

The downstream speed of a boat is $42$ km/hr and the speed of current is $3$ km/hr. What is the total time (in hours) taken by the boat to cover $72$ km upstream and $84$ km downstream?

Ratio between speed of boat in still water to speed of stream is $8:1$.If $67.5$ kms is travelled downstream in $2.5$ hours then find the difference between speed of boat in still water to speed of stream?

The speed of a stream is $3 \mathrm{km}/\mathrm{hr}$. A boat goes $60 \mathrm{km}$ and comes back to the starting point in $15$ hours. What is the speed (in $\mathrm{km}/\mathrm{hr}$) of the boat in still water?

A boat in still water takes $15$ hours to reach its destination and come back from there. In the same river, it takes $16$ hours for the same journey where there is a current in the water. The difference between the speed of the boat and the river current is $15$ $km/hr$. Find out the speed of the river?