Question

If a car travels at the speed of 72 km/hr, then the distance travelled by it in one second is:

• A. 40 meter
• B. 30 meter
• C. 25 meter
• D. 20 meter

Hint:

To convert km/hr to m/sec, multiply by \( \frac{5}{18} \). To convert m/sec to km/hr, multiply by \( \frac{18}{5} \).

Answer 1

The Correct Option is D

Step 1: Convert speed to meters per second - Given speed: \( 72 \) km/hr - Convert km/hr to m/sec: \[ 1 \text{ km/hr} = \frac{5}{18} \text{ m/sec} \] \[ 72 \times \frac{5}{18} = 20 \text{ m/sec} \] Step 2: Calculate distance in one second - Distance traveled in 1 second = Speed (in m/sec) \[ = 20 \text{ meters} \]