Question

a car travel a distance of 2000 metre if the first half distance is covered at 40 kilometre per hour and the second half of velocity v and if the average velocity is 48 kilometre per hour then the value of v is

Answer 1

total time of journey = 1/24 hr
time taken for 1st half journey = 1/40 hr
time taken in 2nd half journey = 1/24 - 1/40
=1/60 ht
and distance is 1km
then the value of v = 60 kmph