a man can row 14 kmph in still water.it takes him thrice as long to row up as to row down the river.find the rate of stream	Choose the correct choice from the following options:
A) 13 km/hr. B) 6 km/hr. C) 7 km/hr. D) 15 km/hr. E) 11 km/hr.
Let manâ€™s rate upstream be x kmph.then ,his rate downstream=3xkmph.   So,2x=14 or x=7.   Rate upstream=7 km/hr,rate downstream=21 km/hr.   Hence,rate of stream=1/2(21-7)km/hr=7 km/hr.   Answer is 7 km/hr..
<result>C</result>
a man can row 14 kmph in still water.it takes him thrice as long to row up as to row down the river.find the rate of stream