A train travels at a speed of 90 km/h and a car at 60 km/h. If they start from t
Practice Questions
Q1
A train travels at a speed of 90 km/h and a car at 60 km/h. If they start from the same point and travel in the same direction, how far apart will they be after 1 hour?
30 km
20 km
10 km
40 km
Questions & Step-by-Step Solutions
A train travels at a speed of 90 km/h and a car at 60 km/h. If they start from the same point and travel in the same direction, how far apart will they be after 1 hour?
Step 1: Identify the speed of the train, which is 90 km/h.
Step 2: Identify the speed of the car, which is 60 km/h.
Step 3: Calculate the difference in speed between the train and the car. This is done by subtracting the car's speed from the train's speed: 90 km/h - 60 km/h.
Step 4: The result of the subtraction gives us the relative speed, which is 30 km/h.
Step 5: Since they are traveling for 1 hour, we need to find out how far apart they will be after that time. We use the relative speed for this calculation.
Step 6: Multiply the relative speed (30 km/h) by the time (1 hour): 30 km/h * 1 hour = 30 km.
Step 7: Therefore, after 1 hour, the train and the car will be 30 km apart.
Relative Speed – The speed of one object as observed from another object, calculated by subtracting the speeds of the two objects when they are moving in the same direction.
Distance Calculation – Using the formula distance = speed × time to determine how far apart two objects will be after a certain period.
