A man can row his boat with the stream at 30 km/h and against the stream in 14 km/h. The man's rate is?	Pick.
A) 1 kmph  B) 4 kmph  C) 5 kmph  D) 7 kmph  E) 8 kmph

Rationale: "ds = 30 us = 14 s = ? s = ( 30 - 14 ) / 2 = 8 kmph answer : e"
Answer: E