A man whose speed is 4.5 kmph in still water rows to a certain upstream point and back to the starting point in a river which flows at 2.5 kmph, find his average speed for the total journey ?	Choose the correct option:	A) 3.1 kmph	B) 5 kmph	C) 6 kmph	D) 4 kmph	E) 7 kmph
Explanation:   Speed of Man = 4.5 kmph   Speed of stream = 2.5 kmph   Speed in DownStream = 7 kmph   Speed in UpStream = 2 kmph   Average Speed = (2 x 7 x 2)/9 = 3.1 kmph.   3.1 kmphnswer: 3.1 kmph
<result>A</result>
A man whose speed is 4.5 kmph in still water rows to a certain upstream point and back to the starting point in a river which flows at 2.5 kmph, find his average speed for the total journey ?