a man can row 24 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 option:
A) 13 km/hr.  B) 12 km/hr.  C) 9 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=24 or x=12.   Rate upstream=12 km/hr,rate downstream=36 km/hr.   Hence,rate of stream=1/2(36-12)km/hr=12 km/hr.   Answer is 12 km/hr..
<result>B</result>
a man can row 24 kmph in still water.it takes him thrice as long to row up as to row down the river.find the rate of stream