Prelims · 8 Mental Ability · 8.5 Time, work, speed and distance

8.5.5 Boats and streams

A stream adds to a boat's speed going down and subtracts going up, so downstream = B + S and upstream = B − S; half their sum is the boat's speed and half their difference is the stream's.

  • APPSC Group 2 · Prelims
  • Standard level
  • 7 min read
  • Full course

Key terms

  • boats and streams
  • downstream
  • upstream
  • still water
  • speed of current
  • round trip
  • floating log
  • two trips
  • boats meeting

What this note covers

  1. Core factsFoundation
  2. ExplainedStandard
  3. DeeperAdvanced
  4. Common trapsFoundation
  5. Quick revisionFoundation

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