A boat can move upstream at 25 kmph and downstream at 31 kmph, then the speed of the current is?	Answers.
A) 3  B) 6  C) 7  D) 54  E) 8
US = 25   DS = 31   M = (31 - 25)/2 = 3.3nswer:3
<result>A</result>
A boat can move upstream at 25 kmph and downstream at 31 kmph, then the speed of the current is?