The variation ofvelocity ofa particle moving along a straight line is illustrated in the following figure-1.122. The distance covered by the particle in 4 seconds is :

Options

A. 60m
B. 25m
C. 55m
D. 30m

Answer

C

Explanation

Distance travelled in 4 sec
=area under the curve
=area of `DeltaAOH+` area of rectangle `ABGH`
+ area of `DeltaBC C^(-)+` area of rectangle `C^(@) DEG`
`=(20xx1)/(2)+20xx1+(10xx1)/(2)+10xx2=55m`