A train is moving at 72 km/h and a bird flies in the opposite direction at 18 km
Practice Questions
Q1
A train is moving at 72 km/h and a bird flies in the opposite direction at 18 km/h. What is the speed of the bird relative to the train?
54 km/h
72 km/h
90 km/h
18 km/h
Questions & Step-by-Step Solutions
A train is moving at 72 km/h and a bird flies in the opposite direction at 18 km/h. What is the speed of the bird relative to the train?
Correct Answer: 90 km/h
Step 1: Identify the speed of the train, which is 72 km/h.
Step 2: Identify the speed of the bird, which is 18 km/h.
Step 3: Since the bird is flying in the opposite direction to the train, we need to add the speeds together.
Step 4: Calculate the relative speed by adding the speed of the train and the speed of the bird: 72 km/h + 18 km/h.
Step 5: The result of the addition is 90 km/h, which is the speed of the bird relative to the train.
Relative Speed – Relative speed is the speed of one object as observed from another object, calculated by adding their speeds when they are moving in opposite directions.
