a train moving with a uniform acceleration crosses station a with a velocity of 108 km per hour and another station b with a velocity of 144 km per hour. the time taken for the train to travel from A to B is 20 minutes .the distance between two stations is
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Answered by
33
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pranjaljha14:
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Answered by
82
Answer:
we know that
v = u + at
or acceleration will be
a = (v - u) / t
here,
v = 108 kmph = 30 m/s
u = 144 kmph = 40 m/s
t = 20min = 1200 s
so,
a = (40 - 30) / 1200
thus,
a = 0.008 m/s2
also we have
s = ut + (1/2)at2
or
s = (30x1200) + (1/2)x0.008x12002
= 36000 + 5760
thus, we have
s = 41760m = 41.76 km
Round off = 42kmph
Explanation:
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