Quantitative Aptitude - Boats & Streams

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Question - 1

In one hour , a boat goes 11 km along the streame and 5 km against the stream. The speed of the boat in still water (in km/hr) in:

  • A 3
  • B 5
  • C 8
  • D 9

Question - 2

A man can row upstream at 8kmph and downstream at 13kmph.The speed of the stream is:

  • A 2.5 km/hr
  • B 4.2 km/hr
  • C 5 km/hr
  • D 10.5 km/hr

Question - 3

A boat running downstream covers a distance of 16km in 2 hours while for covering the same distance upstream,it takes 4 hours.What is the speed of the boat in still water?

  • A 4 km/hr
  • B 6 km/hr
  • C 8 km/hr
  • D data inadequate

Question - 4

A boatman goes 2 km against the current of the stream in 1 hour and goes 1 km along the current in 10 minutes. How long will take to go 5km in stationery water?

  • A 40 minutes
  • B 1 hour
  • C 1 hr 15min
  • D 1 hr 30 min

Question - 5

A man can row  three quarters of a kilometers against the stream in 11 1/4 minutes.The speed(in km/hr)of the man in still water is:

  • A 2
  • B 3
  • C 4
  • D 5

Question - 6

A man takes twice twice as long to row a distance against the stream as to row the same distance in favour of the stream.The ratio of the speed of the boat(in still water) and the stream is:

  • A 2 :1
  • B 3 :1
  • C 3 :2
  • D 4 :3

Question - 7

A boat running upstream takes 8 hours 48 minutes to cover a certain distance while it takes 4 hours to cover the same distance running downstream.What is the ratio between the speed of the boat and speed of the water current respectively?

  • A 2:1
  • B 3:2
  • C 8:3
  • D Cannot be determined
  • E None of these

Question - 8

If a boat goes 7 km upstream in 42 minutes and the speed of the stream is a 3 kmph, then the speed of the boat in still water is:

  • A 4.2 km/hr
  • B 9 km/hr
  • C 13 km/hr
  • D 21 km/hr

Question - 9

A man's speed with the current is 15 km/hr and the speed of the current is 2.5 km/hr. The man's speed against the current is:

  • A 8.5 km/hr
  • B 9 km/hr
  • C 10 km/hr
  • D 12.5 kim/hr

Question - 10

If a man rows at the rate of 5 kmph in still water and his rate against the current in 3.5 kmph,then the man's rate along the current is:

  • A 4.25 kmph
  • B 6 kmph
  • C 6.5 kmph
  • D 8.5 kmph