The speed-time graph for a car is shown is Figure

(a) Find how far does the car travel in the first `4` seconds. Shade the area on the graph that represents the distance travelled by the car during this period.
(b) Which part of the graph represents uniform motion of the car ?

Explanation

(a)
The shaded area which is equal to `1//2xx4xx6=12` m represents the distance travelled by the car in the first 4s.
(b)
The part of the graph in red colour between time 6 s to 10 s represents uniform motion of the car.