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A boat running downstream covers a distance of 18 km in 2 hours while for covering the same distance upstream, it takes 3 hours. What is the speed of the boat in still water?
  • a)
    8.5 kmph
  • b)
    9 kmph
  • c)
    5.5 kmph
  • d)
    7.5 kmph
Correct answer is option 'D'. Can you explain this answer?
Verified Answer
A boat running downstream covers a distance of 18 km in 2 hours while...
Speed of boat in downstream = 18 ÷ 2 = 9 kmph
Speed of boat in upstream = 18 ÷ 3 = 6 kmph
Speed of boat in still water = 1 ÷ 2 (9 + 6) = 7.5 kmph
Hence the correct option is D.
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A boat running downstream covers a distance of 18 km in 2 hours while for covering the same distance upstream, it takes 3 hours. What is the speed of the boat in still water?a)8.5 kmphb)9 kmphc)5.5 kmphd)7.5 kmphCorrect answer is option 'D'. Can you explain this answer?
Question Description
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