If a train of length 63 m having 7 freight cars rolls by you at the rate of three cars each second, whatis the speed of the train

To solve this problem, we need to understand the relationship between speed, distance, and time.

Step 1: Determine the length of each freight car. The train is 63 meters long and has 7 freight cars. Therefore, each car is 63/7 = 9 meters long.

Step 2: Determine the time it takes for one car to pass by. The train passes by at a rate of three cars each second. Therefore, it takes 1/3 of a second for one car to pass by.

Step 3: Calculate the speed of the train. Speed is calculated by dividing the distance by the time. In this case, the distance is the length of one car (9 meters) and the time is the time it takes for one car to pass by (1/3 of a second). Therefore, the speed of the train is 9/(1/3) = 27 meters per second.