A car traveling with constant speed travels 150km in 7200s. What is the speed of the car?

Solution:

The problem can be depicted by the diagram below:

The speed of the car for the entire journey is given by the relationship:

Speed = Total Distance Travelled/Total time taken

The total distance traveled by car is 150Km and the total time taken is 7200 seconds which is equal to 2 hours. Hence the speed for the entire distance traveled is calculated as:

Speed = (150/2) Km/hr = 75Km/hr

The given problem is a typical speed-distance problem. The problem also states that the car traveled at a constant speed. If that was not the case then it would have been stated that the average speed of the car was 75 km/hour. It is seldom or very rare to have a car traveling the distance at a constant speed. In this problem, the speed of the car at any given point of time is the same i.e. 75 km/hour. Had the assumption of constant speed not been made then the speed of 75 km/hour would have been called the average speed.

A car traveling with constant speed travels 150km in 7200s. What is the speed of the car?

Summary:

A car traveling with constant speed travels 150km in 7200s. The total distance traveled by car is 150Km and the total time taken is 7200 seconds which is equal to 2 hours. Hence the speed for the entire distance traveled is calculated as 75 Km/hr.