Final answer:
To find Rahul's speed in km/hr, we convert 500 meters to 0.5 km and 20 minutes to 0.3333 hours, then divide distance by time to get the speed, which is approximately 1.5 km/hr.
Step-by-step explanation:
Calculating Speed in km/hr
To calculate Rahul's speed in kilometers per hour (km/hr), we first need to express the distance and time in compatible units. Rahul covered a distance of 500 meters (m) in 20 minutes (min). Since 1 kilometer (km) is equal to 1000 meters, we convert the distance from meters to kilometers:
500 m × (1 km / 1000 m) = 0.5 km
Similarly, we convert the time from minutes to hours knowing that 1 hour is equal to 60 minutes:
20 min × (1 hour / 60 min) = 0.3333 hours
Now, we use the formula for speed, which is distance divided by time, to find Rahul's speed:
Speed = Distance / Time = 0.5 km / 0.3333 hours ≈ 1.5 km/hr
This calculation shows that Rahul's speed was approximately 1.5 km/hr, which can be checked for reasonability by understanding that traveling 0.5 km in a third of an hour would indeed result in a speed of three times the distance if done in a full hour.