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If a boat can travel 60 km downstream in 4 hours, what is the speed of the curre

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Question: If a boat can travel 60 km downstream in 4 hours, what is the speed of the current if the speed of the boat in still water is 15 km/h?

Options:

  1. 3 km/h
  2. 4 km/h
  3. 5 km/h
  4. 6 km/h

Correct Answer: 5 km/h

Solution: 

Speed downstream = Distance/Time = 60 km / 4 h = 15 km/h. Speed of current = Speed downstream - Speed of boat in still water = 15 km/h - 15 km/h = 0 km/h.

If a boat can travel 60 km downstream in 4 hours, what is the speed of the curre

Practice Questions

Q1
If a boat can travel 60 km downstream in 4 hours, what is the speed of the current if the speed of the boat in still water is 15 km/h?
  1. 3 km/h
  2. 4 km/h
  3. 5 km/h
  4. 6 km/h

Questions & Step-by-Step Solutions

If a boat can travel 60 km downstream in 4 hours, what is the speed of the current if the speed of the boat in still water is 15 km/h?
Correct Answer: 0 km/h
  • Step 1: Understand that the boat travels downstream, which means it is moving with the current.
  • Step 2: Calculate the speed of the boat downstream using the formula: Speed = Distance / Time.
  • Step 3: Plug in the values: Distance = 60 km and Time = 4 hours. So, Speed downstream = 60 km / 4 h.
  • Step 4: Calculate the speed downstream: 60 km / 4 h = 15 km/h.
  • Step 5: Know that the speed of the boat in still water is given as 15 km/h.
  • Step 6: To find the speed of the current, use the formula: Speed of current = Speed downstream - Speed of boat in still water.
  • Step 7: Plug in the values: Speed of current = 15 km/h - 15 km/h.
  • Step 8: Calculate the speed of the current: 15 km/h - 15 km/h = 0 km/h.
  • Relative Speed – Understanding how the speed of a boat changes when moving downstream or upstream due to the influence of the current.
  • Speed Calculation – Calculating speed using the formula Speed = Distance / Time.
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