Speed of a boat is 6 km/hr is still water and the speed of the stream is 1 km/hr. If the boat takes 12 hours to go to a place and come back, then what is the distance (in km) of the place?
  • a)
    21
  • b)
    28
  • c)
    35
  • d)
    70
Correct answer is option 'C'. Can you explain this answer?
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SSC Question

By SOURAV KUMAR · Jul 06, 2020 ·SSC
Knowledge Hub answered Jul 06, 2020
Given,
Speed of boat = u = 6 km/hr
Speed of stream = v = 1 km/hr
Speed of boat in downstream = (u + v) = 7 km/hr
Speed of boat in upstream = (u - v) = 5 km/hr
If the boat takes 12 hours to go to a place and come back,
The equation is

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