Question

A train travels with a speed of 60 km per hour from station a to station b and then comes back with a speed 80 km per hour from station b2 station near find the average speed and the average velocity of train

Answer 1

time for up jrn=s/60. for down =s/80 total time=s/60+s/80=7s/240. dist 2s. av vel=480/7=
68 4/7 kmph