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A boat takes 4 more hours to travel 180 km upstream than to travel the same distance downstream. If the still water speed of the boat is 28 km/hr, what is the stream speed?
  • a)
    6 km/hr
  • b)
    8 km/hr
  • c)
    10 km/hr
  • d)
    12 km/hr
Correct answer is option 'B'. Can you explain this answer?
Verified Answer
A boat takes 4 more hours to travel 180 km upstream than to travel th...
Let the stream speed be 'r' km/hr.
180/(28 - r) = 4 + 180/(28 + r
45/(28 - r) - 45/(28 + r) = 1
90r/(784 - r2) =
r2 + 90r - 784 = 0
(r - 8)(r + 98) = 0
r = 8
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A boat takes 4 more hours to travel 180 km upstream than to travel the same distance downstream. If the still water speed of the boat is 28 km/hr, what is the stream speed?a)6 km/hrb)8 km/hrc)10 km/hrd)12 km/hrCorrect answer is option 'B'. Can you explain this answer?
Question Description
A boat takes 4 more hours to travel 180 km upstream than to travel the same distance downstream. If the still water speed of the boat is 28 km/hr, what is the stream speed?a)6 km/hrb)8 km/hrc)10 km/hrd)12 km/hrCorrect answer is option 'B'. Can you explain this answer? for Railways 2024 is part of Railways preparation. The Question and answers have been prepared according to the Railways exam syllabus. Information about A boat takes 4 more hours to travel 180 km upstream than to travel the same distance downstream. If the still water speed of the boat is 28 km/hr, what is the stream speed?a)6 km/hrb)8 km/hrc)10 km/hrd)12 km/hrCorrect answer is option 'B'. Can you explain this answer? covers all topics & solutions for Railways 2024 Exam. Find important definitions, questions, meanings, examples, exercises and tests below for A boat takes 4 more hours to travel 180 km upstream than to travel the same distance downstream. If the still water speed of the boat is 28 km/hr, what is the stream speed?a)6 km/hrb)8 km/hrc)10 km/hrd)12 km/hrCorrect answer is option 'B'. Can you explain this answer?.
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