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The speed of a boat in still water is 50 km/hr. It covers a distance of 500 km upstream in 20 hours. What is the speed (in km/hr) of the stream?
  • a)
    20
  • b)
    25
  • c)
    45
  • d)
    30
Correct answer is option 'B'. Can you explain this answer?
Verified Answer
The speed of a boat in still water is 50 km/hr. It covers a distance o...
Let the speed of the stream = x km/hr
Given,
Speed of the boat in still water = 50 km/hr
∴ Speed of the boat towards upstream = (50 - x) km/hr
Distance covered = 500 km
Time taken = 20 hr
∵ Distance covered = Speed × Time taken
⇒ 500 = (50 - x) × 20
⇒ 25 = (50 - x)
⇒ x = 25 km/hr
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The speed of a boat in still water is 50 km/hr. It covers a distance of 500 km upstream in 20 hours. What is the speed (in km/hr) of the stream?a)20b)25c)45d)30Correct answer is option 'B'. Can you explain this answer?
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