A river flows at a speed of 4 km/h. If a boat can travel at 10 km/h in still wat

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Question: A river flows at a speed of 4 km/h. If a boat can travel at 10 km/h in still water, what is the speed of the boat when going upstream?

Options:

Correct Answer: 6 km/h

Solution:

Speed upstream = Speed of boat - Speed of river = 10 km/h - 4 km/h = 6 km/h.

A river flows at a speed of 4 km/h. If a boat can travel at 10 km/h in still water, what is the speed of the boat when going upstream?

A river flows at a speed of 4 km/h. If a boat can travel at 10 km/h in still water, what is the speed of the boat when going upstream?

Step 1: Identify the speed of the river, which is 4 km/h.
Step 2: Identify the speed of the boat in still water, which is 10 km/h.
Step 3: Understand that when the boat is going upstream, it is moving against the current of the river.
Step 4: To find the speed of the boat going upstream, subtract the speed of the river from the speed of the boat.
Step 5: Perform the calculation: 10 km/h (speed of the boat) - 4 km/h (speed of the river) = 6 km/h.
Step 6: Conclude that the speed of the boat when going upstream is 6 km/h.

Relative Speed – Understanding how to calculate the effective speed of a boat when considering the current of the river.
Upstream vs Downstream – Differentiating between the speeds of a boat when moving against the current (upstream) versus with the current (downstream).