A man can row his boat with the stream at 36 km/h and against the stream in 8 km/h. The man's rate is?
Choose one
A) 1 kmph  B) 6 kmph  C) 7 kmph  D) 14 kmph  E) 9 kmph

Rationale: "explanation : ds = 36 us = 8 s = ? s = ( 36 - 8 ) / 2 = 14 kmph answer : d"
Answer: D