Question

the velocity of train increases uniformly from 20 kilometre per hour to 60 kilometre per hour in 4 hours the distance travelled by the train during this time period is

Answer 1

u = 20km/h

v = 60km/h

t = 4h

v = u+at

60 = 20+a(4)

4a = 40

a = 10km/h²

v² = u²+2as

(60)² = (20)²+2(10)s

3600 = 400 + 20s

180 = 20+s

s = 160

Hence, the train has travelled 160km in the given time period.