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36km/hr=36*5/18=10m/s
18km/hr=18*5/18=5m/s
a=v-u/t (as v=u+at)
putting values in formula-
a=10-5/5=1m/s^2
distance covered=
v^2-u^2=2as
s=v^2-u^2/2a
putting values
s=100-25/2*1=75/2=37.4m
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