A car is travelling on a straight line moves with a uniform velocity V1 for a distance 20m and with a uniform velocity V2 for the next equal distance. Then the average velocity ‘V’ is given by…

Time taken to travel a distance of 20m is t1=20V1 Time taken to travel next same distance of 20 is t2=20V2 : Averave velocity V= Total displacement  Total time =20+2020V1+20V2V=21V1+1V2∴2V=1V1+1V2