Boats and Streams Problems

A boat covers a distance of $24$km in down stream in $4$hours while it covers the same distance in upstream in $6$hours. What is the speed of boat in still water?

The time taken by a motorboat to travel $1050 \mathrm{km}$ upstream is $40$ hours more than the time taken by it to travel the same distance downstream. The speed of the motorboat in still water is $500\%$ more than that of the speed of the stream.

Quantity I: How much time will the motorboat take to travel the same distance upstream?

The ratio of speed of a boat in still water to speed of stream is $14:3$, respectively. If a boat can travel a distance of $99 \mathrm{km}$ upstream and $119 \mathrm{km}$ downstream together in $8$ hours, then find the total time taken by the boat to cover 84 km in still water and $51 \mathrm{km}$ downstream?

The ratio of speed of a boat in still water to speed of stream is $14:3$, respectively. If a boat can travel a distance of $99 \mathrm{km}$ upstream and $119 \mathrm{km}$ downstream together in $8$ hours, then find the total time taken by the boat to cover $84 \mathrm{km}$ in still water and $51 \mathrm{km}$ downstream?

Ratio of speed of a boat in still water to speed of stream is $9:2$. The boat travels a distance of $(\mathrm{D}+40) \mathrm{km}$ downstream and $\mathrm{D} \mathrm{km}$ upstream. If the ratio of time taken by the boat to travel upstream and downstream is $4:3$, respectively, then find the value of $\mathrm{D}$?

Speed of A boat downstream is $12\%$ more than the speed of boat in still water. If a boat can travel $77 \mathrm{km}$ upstream and $126 \mathrm{km}$ downstream in $8$ hours, then find the time taken by boat to cover $154 \mathrm{km}$ upstream as well as downstream?

Ratio between the speed of the boat in still water to the speed of the stream is $8:1$. If $67.5 \mathrm{km}$ is traveled downstream in $2.5$hours, then find the difference between the speed of the boat in still water to the speed of the stream (in kmph)?

A boat covers $122.5$ km distance downstream at $30$ kmph and $240$ km upstream at $6$ kmph. If the speed of the boat and the speed of the stream are increased by $11\frac{1}{9}\%$ and $25\%$, respectively, then what is the total time taken by the boat to cover the same distance upstream and downstream?

A boat can cover $100$ km upstream and $90$ km downstream in $6$ hours. The downstream speed of the boat is $80\%$ more than the upstream speed. Find the time taken by boat to travel $150$ km upstream with a stream speed double the normal stream speed

A boat goes $28$ km downstream and, while returning, covers only $75\%$ of the distance that was covered in downstream. If the boat takes $3$ hr more to cover the upstream than downstream, then find the speed of the boat in still water (km/hr) if the speed of the stream is $\frac{5}{9}$ m/s

A man can row $8 km/hr$ in still water. When the river is running at $4 km/hr$, it takes him $2\frac{1}{3}$ hr to row to a place and come back. How far is the place?

A boat goes $4 km$ against the current of the stream in $1$ hour and goes $1 km$ along the current in $10$ minutes. How long will it take to go $15 km$ in stationary water?

A boat running downstream covers a distance of $40 km$ in $5$ hrs and for covering the same distance upstream it takes $10$ hrs. What is the speed of the stream?

A boat covers a certain distance downstream in $2$ hour, while it comes back in $2\frac{1}{2}$ hours. If the speed of the stream be $5 kmph$, what is the speed of the boat in still water?

A man can row $8 km/hr$ in still water. When the river is running at $4 km/hr$, it takes him $2\frac{1}{3} hr$ to row to a place and come back. How far is the place? 

A man rows to a place $40 km$ distant and come back in $9$ hours. He finds that he can row $5 km$ with the stream in the same time as $4 km$ against the steram. The rate of the stream is:

A boat goes $4 km$ against the current of the stream in $1$ hour and goes $1 km$ along the current in $10$ minutes. How long will it take to go $15 km$ in stationary water? 

A boat running downstream covers a distance of $40 km$ in $5$ hrs and for covering the same distance upstream it takes $10$ hrs. What is the speed of the stream?

A boat covers a certain downstream in $2$ hour, while it connect back in $2\frac{1}{2}$ hours. If the speed of the stream be $5 kmph$, what is the speed of the baot in still water?

A boat whose speed in $20 km/hr$ in still water goes $40 km$ downstream and comes back in a total of $5$ hours. The approx. speed of the stream (in $km/hr$) is: