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A river flows at a speed of 4 km/h. If a boat can travel at 10 km/h in still wat
Practice Questions
Q1
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?
6 km/h
14 km/h
4 km/h
10 km/h
Questions & Step-by-Step Solutions
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?
Steps
Concepts
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).
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