WBCS.LIVE practice question

A boat covers a certain distance downstream in 4 hours but takes 6 hours to return upstream to the starting point. If the speed of the stream be 2 km/h, find the speed of the boat in still water.

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

Answer options

  1. 5 km/hr
  2. 8 km/hr
  3. 7 km/hr
  4. 10 km/hr

Correct answer and explanation

Correct answer: 10 km/hr