A boat can travel 40 km downstream in 2 hours. If the speed of the current is 4

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Question: A boat can travel 40 km downstream in 2 hours. If the speed of the current is 4 km/h, what is the speed of the boat in still water?

Options:

Correct Answer: 16 km/h

Solution:

Speed downstream = 40 km / 2 h = 20 km/h. Speed of boat in still water = Speed downstream - Speed of current = 20 km/h - 4 km/h = 16 km/h.

A boat can travel 40 km downstream in 2 hours. If the speed of the current is 4 km/h, what is the speed of the boat in still water?

A boat can travel 40 km downstream in 2 hours. If the speed of the current is 4 km/h, what is the speed of the boat in still water?

Step 1: Calculate the speed downstream by dividing the distance traveled by the time taken. The boat travels 40 km in 2 hours, so speed downstream = 40 km / 2 h.
Step 2: Perform the division to find the speed downstream. 40 km / 2 h = 20 km/h.
Step 3: Identify the speed of the current, which is given as 4 km/h.
Step 4: To find the speed of the boat in still water, subtract the speed of the current from the speed downstream. Speed of boat in still water = Speed downstream - Speed of current.
Step 5: Perform the subtraction. 20 km/h - 4 km/h = 16 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.