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_________? September 23, 2025 by Admin A. 6 kmph B. 7 kmph C. 8.5 kmph D. 8 kmph ✅ The correct answer is option A. 6 kmph.