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A boat goes upstream at speed of 10 km/hr. It goes downstream at a speed of 30 km/hr. how much time will the boat take to cover a distance of 30 km in still water?
  • a)
    2 hours
  • b)
    1 hour
  • c)
    3 hours
  • d)
    90 minutes
Correct answer is option 'D'. Can you explain this answer?
Verified Answer
A boat goes upstream at speed of 10 km/hr. It goes downstream at a spe...
Let the speed of boat in still water be x
Let the speed of the stream be y
⇒ Upstream speed = x - y = 10 km/hr
⇒ Downstream speed = x + y = 30 km/hr
Solving
⇒ x = 20 Km/hr
⇒ y = 10 km/hr
⇒ Speed of boat in still water = 20 km/hr
∴ Time = Distance ÷ Speed = 30 ÷ 20 = 1.5 hours = 90 minutes
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Most Upvoted Answer
A boat goes upstream at speed of 10 km/hr. It goes downstream at a spe...
Let the speed of boat in still water be x
Let the speed of the stream be y
⇒ Upstream speed = x - y = 10 km/hr
⇒ Downstream speed = x + y = 30 km/hr
Solving
⇒ x = 20 Km/hr
⇒ y = 10 km/hr
⇒ Speed of boat in still water = 20 km/hr
∴ Time = Distance ÷ Speed = 30 ÷ 20 = 1.5 hours = 90 minutes
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A boat goes upstream at speed of 10 km/hr. It goes downstream at a speed of 30 km/hr. how much time will the boat take to cover a distance of 30 km in still water?a)2 hoursb)1 hourc)3 hoursd)90 minutesCorrect answer is option 'D'. Can you explain this answer?
Question Description
A boat goes upstream at speed of 10 km/hr. It goes downstream at a speed of 30 km/hr. how much time will the boat take to cover a distance of 30 km in still water?a)2 hoursb)1 hourc)3 hoursd)90 minutesCorrect answer is option 'D'. Can you explain this answer? for SSC 2024 is part of SSC preparation. The Question and answers have been prepared according to the SSC exam syllabus. Information about A boat goes upstream at speed of 10 km/hr. It goes downstream at a speed of 30 km/hr. how much time will the boat take to cover a distance of 30 km in still water?a)2 hoursb)1 hourc)3 hoursd)90 minutesCorrect answer is option 'D'. Can you explain this answer? covers all topics & solutions for SSC 2024 Exam. Find important definitions, questions, meanings, examples, exercises and tests below for A boat goes upstream at speed of 10 km/hr. It goes downstream at a speed of 30 km/hr. how much time will the boat take to cover a distance of 30 km in still water?a)2 hoursb)1 hourc)3 hoursd)90 minutesCorrect answer is option 'D'. Can you explain this answer?.
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