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A boat covers 1.5 km upstream in 10 minutes and 1.5 km downstream in 6 minutes. What is the speed of the current in metres per second?

Competition practiceBoats & Streams
  • A5/6 m/s
  • B3 m/s
  • C5/3 m/s
  • D1/2 m/s

Step-by-Step Solution

Upstream = 9 km/, downstream = 15 km/, so current = 3 km/ m/s. (3 m/s forgets to convert.)
Answer: A) 5/6 m/s

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