A man can row a boat at 5 km/h in still water. If he rows upstream against a cur

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Question: A man can row a boat at 5 km/h in still water. If he rows upstream against a current of 3 km/h, what is his effective speed?

Options:

Correct Answer: 2 km/h

Solution:

Effective speed upstream = Speed in still water - Speed of current = 5 km/h - 3 km/h = 2 km/h.

A man can row a boat at 5 km/h in still water. If he rows upstream against a current of 3 km/h, what is his effective speed?

A man can row a boat at 5 km/h in still water. If he rows upstream against a current of 3 km/h, what is his effective speed?

Step 1: Understand that the man can row at a speed of 5 km/h in still water.
Step 2: Know that there is a current flowing against him at a speed of 3 km/h.
Step 3: To find the effective speed when rowing upstream, subtract the speed of the current from the speed in still water.
Step 4: Perform the calculation: 5 km/h (speed in still water) - 3 km/h (speed of current) = 2 km/h.
Step 5: Conclude that the man's effective speed while rowing upstream is 2 km/h.

Relative Speed – Understanding how to calculate effective speed when moving against a current.
Speed in Still Water – Recognizing the difference between speed in still water and speed against a current.