Answers

2016-01-20T17:09:42+05:30
Av. speed = u + v / t
or, 25 = 30 + 10 / t
or, t = 40 / 25 = 1.6 s

s = d / t 
or, 25 = d / 1.6 
so, d = 25 x 1.6 = 400 m
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