If a boat can travel 50 km upstream in 10 hours, what is the speed of the stream

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Question: If a boat can travel 50 km upstream in 10 hours, what is the speed of the stream if the speed of the boat in still water is 15 km/h?

Options:

Correct Answer: 1 km/h

Solution:

Speed upstream = 50 km / 10 h = 5 km/h. Speed of stream = Speed of boat - Speed upstream = 15 - 5 = 10 km/h.

If a boat can travel 50 km upstream in 10 hours, what is the speed of the stream if the speed of the boat in still water is 15 km/h?

If a boat can travel 50 km upstream in 10 hours, what is the speed of the stream if the speed of the boat in still water is 15 km/h?

Step 1: Understand that the boat travels upstream against the current of the stream.
Step 2: Calculate the speed of the boat when it is going upstream. Use the formula: Speed = Distance / Time.
Step 3: Plug in the values: Distance = 50 km and Time = 10 hours. So, Speed upstream = 50 km / 10 h.
Step 4: Calculate the speed upstream: 50 km / 10 h = 5 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 stream, use the formula: Speed of stream = Speed of boat - Speed upstream.
Step 7: Plug in the values: Speed of stream = 15 km/h - 5 km/h.
Step 8: Calculate the speed of the stream: 15 km/h - 5 km/h = 10 km/h.

Relative Speed – Understanding how the speed of a boat is affected by the current of the stream when traveling upstream.
Speed Calculation – Calculating speed using distance and time, and applying it to find the effective speed against a current.