A boat travels 90 km downstream in 6 hours. If the speed of the current is 3 km/

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Question: A boat travels 90 km downstream in 6 hours. If the speed of the current is 3 km/h, what is the speed of the boat in still water?

Options:

Correct Answer: 15 km/h

Solution:

Speed downstream = 90 / 6 = 15 km/h. Speed in still water = Speed downstream - Speed of current = 15 - 3 = 12 km/h.

A boat travels 90 km downstream in 6 hours. If the speed of the current is 3 km/h, what is the speed of the boat in still water?

A boat travels 90 km downstream in 6 hours. If the speed of the current is 3 km/h, what is the speed of the boat in still water?

Step 1: Identify the distance traveled downstream, which is 90 km.
Step 2: Identify the time taken to travel that distance, which is 6 hours.
Step 3: Calculate the speed downstream by dividing the distance by the time: Speed downstream = 90 km / 6 hours = 15 km/h.
Step 4: Identify the speed of the current, which is 3 km/h.
Step 5: Calculate the speed of the boat in still water by subtracting the speed of the current from the speed downstream: Speed in still water = Speed downstream - Speed of current = 15 km/h - 3 km/h = 12 km/h.

Relative Speed – Understanding how the speed of a boat is affected by the current when traveling downstream and upstream.
Basic Arithmetic – Performing calculations involving speed, distance, and time.