Answer:
120 metres
Step-by-step explanation:
The question says to find the distance between 20 and 80 seconds, so just take the area of the graph between 20 and 80 seconds.
This would result in a shape of a rectangle. [refer to the image attached]
In order to find the distance travelled in that particular time, just find the area of the rectangle.
But here, instead of the length and width being distances in metres, the length would be the velocity and the width would be the time [as per the axis of the graph]. So,
Length = 60 [seconds]
Width = 2 [m/s]
The formula for finding the area of a rectangle is:
Area of a rectangle = length × width
Area of the rectangle = 60 × 2
Area of the rectangle = 120
∴ distance travelled between 20 and 80 seconds is 120m.
