Ajay can row his boat in still water, at a speed of 6 kmph. If the speed of the stream is 4 kmph, how long will it take to a distance of 30 km downstream?
Show answer & explanation
Correct answer: D
Explanation
The correct answer is option 4 i.e. 3 hours.
Speed of boat downstream = speed of boat + speed of the stream
Hence speed of boat in downstream = 6 + 4 = 10 kmph
Time = Distance/Speed
Time = 30/10 = 3hrs.