A man can row his boat with the stream at 6 km/h and against the stream in 4 km/h. The man’s rate is________?
A. 1 kmph
B. 5 kmph
C. 8 kmph
D. 3 kmph
Explanation:
DS = 6
US = 4
S = ?
S = (6 – 4)/2 = 1 kmph