If a boat can travel 60 km downstream in 4 hours, and the speed of the current i

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Question: If a boat can travel 60 km downstream in 4 hours, and the speed of the current is 6 km/h, what is the speed of the boat in still water?

Options:

Correct Answer: 18 km/h

Solution:

Speed downstream = 60 / 4 = 15 km/h. Speed in still water = Speed downstream - Speed of current = 15 - 6 = 9 km/h.

If a boat can travel 60 km downstream in 4 hours, and the speed of the current is 6 km/h, what is the speed of the boat in still water?

If a boat can travel 60 km downstream in 4 hours, and the speed of the current is 6 km/h, what is the speed of the boat in still water?

Step 1: Calculate the speed of the boat downstream. To do this, divide the distance traveled downstream (60 km) by the time taken (4 hours). So, speed downstream = 60 km / 4 hours.
Step 2: Perform the calculation from Step 1. 60 km / 4 hours = 15 km/h. This is the speed of the boat when going downstream.
Step 3: Identify the speed of the current, which is given as 6 km/h.
Step 4: To find the speed of the boat in still water, subtract the speed of the current from the speed downstream. So, speed in still water = speed downstream - speed of current.
Step 5: Perform the calculation from Step 4. Speed in still water = 15 km/h - 6 km/h = 9 km/h.

Relative Speed – Understanding how the speed of a boat is affected by the current when traveling downstream.
Basic Arithmetic – Calculating speed using distance and time, and performing simple subtraction.