A man rows his boat 60 km downstream and 30 km upstream taking 3 hrs each time. Find the speed of the stream ?	Choose the correct option
A) 5 kmph  B) 6 kmph  C) 8 kmph  D) 1 kmph  E) 2 kmph

Rationale: explanation : speed of the boat downstream = speed of the boat upstream \ small \ therefore the speed of the stream = answer : a
Answer: A