i row from a to b against the current in 8 hrs and from b to a in 2 hrs if speed of river is 9 m/sec.what is the speed of boat in still water.  Choose the correct choice:
A) 10 m/sec
B) 15 m/sec
C) 25 m/sec
D) 18 m/sec
E) 20 m/sec
If x m/sec is my speed in still water , then   (x+9)*2*3600= (x-9)*8*3600   6x=90   x= 15 m/sec   ANSWER:15 m/sec
<result>B</result>
i row from a to b against the current in 8 hrs and from b to a in 2 hrs if speed of river is 9 m/sec.what is the speed of boat in still water.