Question

A train accelerated from 20km/h to 80km/h in 4minutes.how much distance does it cover in this period

Answer 1

hey bro here's the answer
given,
  v = 80 km/h
  u= 20 km/h
  t = 4 min = 0.066 hr
            v = u+a t
            a = v - u/ t
              = (80 - 20 )/ 0.066
  = 909.09 km/h2
  v2-u2 = 2 a s
6400 - 4000  = 2 × 909.09× s
  s = 1.32 km
that's the answer hope it helps you