The current of a stream at 1 kmph. A motor boat goes 35 km upstream and back to the starting point in 12 hours. The speed of the motor boat in still water is?	Choose the correct choice from the following answers:
A) 6 kmph B) 9 kmph C) 7 kmph D) 5 kmph E) 1 kmph
S = 1   M = x   DS = x + 1   US = x - 1   35/(x + 1) + 35/(x - 1) = 12   x = 6   6 kmphnswer:6 kmph
<result>A</result>
The current of a stream at 1 kmph. A motor boat goes 35 km upstream and back to the starting point in 12 hours. The speed of the motor boat in still water is?