Question

a body covers half of its journey with a speed of 60m/s and the other half with a speed of 40m/s. then find the average speed during the whole journey

Answer 1

here
v1=60m/s
v2=40m/s
formula for when s1=s2
=2v1v2/v1+v2
=2 (60)(40)/60+40
=4800/100
=48m/s