The driver of a car sees a person 80 meters ahead of him. The person is 120 meters behind after 40 seconds. If the speed of the car is , find the speed of the person?

 

Concept: Speed is the ratio of distance traveled to time spent traveling. Because it has just one direction and no magnitude, speed is a scalar quantity.

Given:

The speed of the car

In starting the person is 80 meters ahead of the car.

The person is 120 meters behind after 40 seconds

When we convert speed into from we multiply by .

Formula used:

Relative speed =

After 30 seconds, the total distance between them.

Now the relative speed =

Then the relative speed in

Now relative speed = speed of car - speed of person

Speed of person

Speed of person

The speed of a person is.