To determine the distance covered by the lorry in 4 seconds, we first need to convert the average speed from kilometers per hour to meters per second.
1 kilometer is equal to 1000 meters, and 1 hour is equal to 3600 seconds. So, to convert from kilometers per hour (km/h) to meters per second (m/s), we can use the following conversion:
90 km/h = (90 * 1000) meters / (3600 seconds)
Simplifying the expression:
90 km/h = 250 meters / second
Now, we can calculate the distance covered by the lorry in 4 seconds:
Distance = Speed * Time
Distance = 250 meters/second * 4 seconds
Distance = 1000 meters
Therefore, the lorry covers a distance of 1000 meters in 4 seconds.