RPH Editorial Team Solutions for Exercise 1: EXERCISE

A man can row $5 \mathrm{km}/\mathrm{hr}$ in still water. If the river is running at $1 \mathrm{km}/\mathrm{hr}$, it takes him $75$ minutes to row to a place and back. How far is the place?

A man can row upstream at $7 kmhr$ and downstream at $10 kmhr$. Find man's rate in still water and the rate of current?

A man can row $9\frac{1}{3} \mathrm{km}/\mathrm{hr}$ in still water and he takes thrice as much time to row up than as to row down the same distance in river. The speed of the current is _____.

A boat travels upstream from B to A and downstream from A to B in $3$ hours. If the speed of the boat in still water is $9 \mathrm{km}/\mathrm{hr}$ and the speed of the current is $3 \mathrm{km}/\mathrm{hr}$, the distance between A and B is _____.

A man can row upstream at $8 kmhr$ and downstream at $13 kmhr$. The speed of the stream is _____.

A man rows $13 \mathrm{km}$ upstream in $5$ hours and also $28 \mathrm{km}$ downstream in $5$ hours. The speed of the stream is _____.

A man can row a boat at $10 kmph$ in still water. If the speed of the stream is $6 kmph$ the time taken to row a distance of $80 km$ down the stream is _____.

If a man rows at $6 \mathrm{km}/\mathrm{hr}$ in still water and $4.5 \mathrm{km}/\mathrm{hr}$ against the current, then his rate along the current is _____.