If julie rows 32 km upstream and 72 km down steam taking 4 hours each, then the speed of the stream	Choose the correct option: A) 1.5 kmph B) 0.5 kmph C) 0.4 kmph D) 1.6 kmph E) 2.5 kmph

Rationale: speed upstream = 32 / 4 = 8 kmph speed down stream = 72 / 8 = 9 kmph speed of stream = ½ ( 9 - 8 ) = 0.5 kmph answer : b
Answer: B