A boat's speed in still water is 8 km/h and the stream flows at 4 km/h. The boat goes 36 km downstream. How…

Boats and Streams · Quantitative Aptitude · Medium · Practice for SSC CGL Tier 1

A boat's speed in still water is 8 km/h and the stream flows at 4 km/h. The boat goes 36 km downstream. How long will the return trip upstream take?

  1. 8 hours
  2. 9 hours
  3. 7 hours
  4. 3 hours
Answer and solution

Correct answer: B) 9 hours

Upstream speed = 8 − 4 = 4 km/h; time = 36/4 = 9 hours.

Learn the method: Boats and Streams rules and worked examples · SSC CGL Tier 1 Quantitative Aptitude

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