## Rajeshkumar Group Title A man can row at 5 kmph in still water. If the velocity of current is 1 kmph and it takes him 1 hour to row to a place and come back, how far is the place? 3 years ago 3 years ago

t=d/r Assume the place is down stream. Let x = the time it takes to row downstream. Solve the following simultaneous equations for x and d:$\left\{x\text{=}\frac{d}{6},(1-x)\text{=}\frac{d}{4}\right\}$$\left\{x\to \frac{2}{5},d\to \frac{12}{5}\right\}$If the place is up stream then let x = the time it takes to row upstream.$\left\{x\text{=}\frac{d}{4},(1-x)\text{=}\frac{d}{6}\right\}$$\left\{x\to \frac{3}{5},d\to \frac{12}{5}\right\}$In either case the place is 12/5 or 2.4 km from the departure point.