WBCS.LIVE practice question

A boat moves in the upstream from city P to city Q and then it returns in the downstream from city Q to city P. If in still water the speed of the boat is 35 km/hr and the stream speed is 5 km/hr. Then what is the average speed of boat in total journey?

Solve this multiple-choice question and check the correct answer with its explanation below.

Answer options

  1. 36.38 km/h
  2. 34.28 km/h
  3. 35 km/h
  4. 33.33 km/h

Correct answer and explanation

Correct answer: 34.28 km/h