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A train 75 meters long overtook a person who was walking at the rate of 6 km an hour and passed him in 71/2 secound. Subsequently it overtook a second

person, and passed him in 63/4 secounds. At what rate was the second person traveling?
a) 3km/hr
b) 5km/hr
c) 2km/hr
d) 4km/hr


The correct answer of above solution may be  (c) 2km/h
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By using slight knowledge I estimate the answer is a
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