Question

A car travels at a speed of $ 72 \, \text{km/h} $. What is the car's speed in meters per second?

• A. \( 20 \, \text{m/s} \)
• B. \( 18 \, \text{m/s} \)
• C. \( 25 \, \text{m/s} \)
• D. \( 30 \, \text{m/s} \)

Hint:

Remember: To convert from km/h to m/s, multiply by \( \frac{5}{18} \).

Answer 1

The Correct Option is A

Step 1: Convert the speed from km/h to m/s
To convert a speed from km/h to m/s, use the following conversion factor: \[ 1 \, \text{km/h} = \frac{1000}{3600} \, \text{m/s} = \frac{5}{18} \, \text{m/s} \]
Step 2: Apply the conversion
Given: - Speed of the car \( = 72 \, \text{km/h} \) \[ \text{Speed in m/s} = 72 \times \frac{5}{18} = 20 \, \text{m/s} \]
Answer:
Therefore, the speed of the car is \( 20 \, \text{m/s} \). So, the correct answer is option (1).