In a stream running at 2kmph,a motor boat goes 6km upstream and back again to the starting point in 33 minutes.find the speed of the motorboat in still water. Choose the correct choice from the following answers:
A) 22
B) 24
C) 26
D) 28
E) None of them
let the speed of the motarboat in still water be x kmph.then,   6/x+2 +6/x-2=33/60   11x2-240x-44=0   11x2-242x+2x-44=0   (x-22)(11x+2)=0   x=22.   22nswer is 22
<result>A</result>
In a stream running at 2kmph,a motor boat goes 6km upstream and back again to the starting point in 33 minutes.find the speed of the motorboat in still water.