A man goes downstream at 10 kmph, and upstream8 kmph. The speed of the stream is  Options.
A) 0 kmph  B) 4 kmph  C) 1 kmph  D) 2.5 kmph  E) 26 kmph

Rationale: "speed of the stream = 1 / 2 ( 10 - 8 ) kmph = 1 kmph . correct option : c"
Answer: C