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
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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.
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