Boats and Streams MCQ

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• 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 it take to go 5 km in stationary water?
  ক

  40 minutes

  খ

  1 hour

  গ

  1 hr 15 min

  ঘ

  1 hr 30 min
• If a boat goes upstream at a speed of 18 km/hr and comes back the same distance at 30 km/hr. What is the average speed (in km/hr) for the total journey?
  ক

  22.5

  খ

  24

  গ

  20.5

  ঘ

  25
• If a boat goes a certain distance at 30 km/hr and comes back the same distance at 60 km/hr. What is the average speed (in km/hr) for the total journey?
  ক

  45

  খ

  50

  গ

  40

  ঘ

  35
• A boat goes a certain distance at 40 km/hr and comes back the same distance at 24 km/hr. What is the average speed (in km/hr) for the total journey?
  ক

  32

  খ

  28

  গ

  34

  ঘ

  30
• A steamer moves with a speed of 4.5 km/h in still water to a certain upstream point and comes back to the starting point in a river which flows at 1.5 km/h. The average speed of steamer for the total journey is
  ক

  12 km\/h

  খ

  10 km\/h

  গ

  6 km\/h

  ঘ

  4 km\/h
• Speeds of a boat along the current and against the current are 14 km/hr and 7 km/hr respectively. What is the speed of boat (in km/hr) in still water?
  ক

  3.5

  খ

  7.5

  গ

  10.5

  ঘ

  9.5