Relative Speed

Step 1: Determine the total relative distance the car gained on the bus. Initially, the car was 90 km behind. Finally, it is 90 km ahead. The total distance the car needed to gain is the initial gap plus the final lead. Relative Distance = .

Step 2: Calculate the relative speed of the car with respect to the bus. Relative Speed = . Relative Speed = .

Step 3: Calculate the actual speed of the car. When two objects move in the same direction, their relative speed is the difference between their individual speeds. Relative Speed = Speed of Car - Speed of Bus. . Speed of Car = .