A boat can travel at 30 km/h in still water. If it goes upstream against a curre

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Question: A boat can travel at 30 km/h in still water. If it goes upstream against a current of 10 km/h, what is its speed relative to the bank?

Options:

Correct Answer: 20 km/h

Solution:

Upstream speed = Speed in still water - Speed of current = 30 km/h - 10 km/h = 20 km/h.

A boat can travel at 30 km/h in still water. If it goes upstream against a current of 10 km/h, what is its speed relative to the bank?

A boat can travel at 30 km/h in still water. If it goes upstream against a current of 10 km/h, what is its speed relative to the bank?

Step 1: Understand that the boat's speed in still water is 30 km/h.
Step 2: Know that the current of the water is flowing at 10 km/h upstream.
Step 3: To find the boat's speed when going upstream, subtract the speed of the current from the speed of the boat in still water.
Step 4: Perform the calculation: 30 km/h (boat speed) - 10 km/h (current speed) = 20 km/h.
Step 5: Conclude that the boat's speed relative to the bank when going upstream is 20 km/h.

Relative Speed – Understanding how to calculate the speed of an object in relation to another moving object, such as a boat against a current.
Basic Arithmetic – Applying basic subtraction to determine the effective speed of the boat when affected by the current.