A boat can travel 20 km downstream in 1 hour. If the speed of the current is 5 k

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Question: A boat can travel 20 km downstream in 1 hour. If the speed of the current is 5 km/h, what is the speed of the boat in still water?

Options:

Correct Answer: 20 km/h

Solution:

Speed downstream = 20 km/h. Speed of boat in still water = Speed downstream - Speed of current = 20 km/h - 5 km/h = 15 km/h.

A boat can travel 20 km downstream in 1 hour. If the speed of the current is 5 km/h, what is the speed of the boat in still water?

A boat can travel 20 km downstream in 1 hour. If the speed of the current is 5 km/h, what is the speed of the boat in still water?

Step 1: Understand that 'downstream' means the boat is moving with the current.
Step 2: The boat travels 20 km downstream in 1 hour, so its speed downstream is 20 km/h.
Step 3: Know that the speed of the current is given as 5 km/h.
Step 4: To find the speed of the boat in still water, subtract the speed of the current from the speed downstream.
Step 5: Calculate the speed of the boat in still water: 20 km/h (downstream speed) - 5 km/h (current speed) = 15 km/h.
Step 6: Conclude that the speed of the boat in still water is 15 km/h.

Relative Speed – Understanding how the speed of a boat is affected by the current when traveling downstream.
Basic Arithmetic – Applying basic subtraction to find the speed of the boat in still water.