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A boat goes 2 km along the stream in 6 minutes and 20 km against the stream in 4 hours. What is the speed of the boat in still water?
  • a)
    8 km/hr
  • b)
    10 km/hr
  • c)
    12.50 km/hr
  • d)
    15 km/hr
Correct answer is option 'C'. Can you explain this answer?
Most Upvoted Answer
A boat goes 2 km along the stream in 6 minutes and 20 km against the s...

Speed of the boat in still water 

Hence, Option C is correct.
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Community Answer
A boat goes 2 km along the stream in 6 minutes and 20 km against the s...
Given Information:
- Speed of boat downstream = 2 km in 6 minutes = 20 km/hr
- Speed of boat upstream = 20 km in 4 hours = 5 km/hr

Let x be the speed of the boat in still water and y be the speed of the stream.

Calculating the speed of the boat in still water:
- Speed of boat downstream = Speed of boat in still water + Speed of stream
- Speed of boat upstream = Speed of boat in still water - Speed of stream
- From the given information, we have:
- Speed of boat downstream = x + y = 20 km/hr
- Speed of boat upstream = x - y = 5 km/hr

Now, solving the equations:
- Adding the two equations:
- (x + y) + (x - y) = 20 + 5
- 2x = 25
- x = 12.50 km/hr
Therefore, the speed of the boat in still water is 12.50 km/hr, which corresponds to option 'C'.
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A boat goes 2 km along the stream in 6 minutes and 20 km against the stream in 4 hours. What is the speed of the boat in still water?a)8 km/hrb)10 km/hrc)12.50 km/hrd)15 km/hrCorrect answer is option 'C'. Can you explain this answer?
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A boat goes 2 km along the stream in 6 minutes and 20 km against the stream in 4 hours. What is the speed of the boat in still water?a)8 km/hrb)10 km/hrc)12.50 km/hrd)15 km/hrCorrect answer is option 'C'. Can you explain this answer? for SSC CGL 2024 is part of SSC CGL preparation. The Question and answers have been prepared according to the SSC CGL exam syllabus. Information about A boat goes 2 km along the stream in 6 minutes and 20 km against the stream in 4 hours. What is the speed of the boat in still water?a)8 km/hrb)10 km/hrc)12.50 km/hrd)15 km/hrCorrect answer is option 'C'. Can you explain this answer? covers all topics & solutions for SSC CGL 2024 Exam. Find important definitions, questions, meanings, examples, exercises and tests below for A boat goes 2 km along the stream in 6 minutes and 20 km against the stream in 4 hours. What is the speed of the boat in still water?a)8 km/hrb)10 km/hrc)12.50 km/hrd)15 km/hrCorrect answer is option 'C'. Can you explain this answer?.
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