Question

a train passes through an intersection at the rate of 3 cars per 30 seconds. Assume that it takes 5 minutes for the train to completely pass through the intersection. How many cars does the train have all together

Answer 1

30

Explanation:

To answer this question, we need to figure out the amount of cars that the train has. The info we have is that the train is moving at 3 cars every 30 seconds. To make this easier to solve, we can multiply the rate by 2 to get the minutely rate, which is 6 cars per minutes. Then you multiply 6 by 5 and you get 30 cars on the train.