Question

A men
covers a dist
a dist with a speed
of 45 kmph. When he increase to 60
kimph it take shr less. dind the
total distance
distance of your
of journey​

Answer 1

Answer:

average speed = total length / total time

if x= distance AB in km then the two times to add are

Tab= x/40 and Tba= x/60

AvSpeed= 2*x/(x/40+x/60) = 2*60*40/(40+60) = 48km/hr

Step-by-step explanation:

hope its help