Two stations P and Q are 42 km apart .A person starts from P ,walks at 4km/h towards Q and meets another person coming from Q toward P after 6 hours . Find the rate at which the second person is walking ,if both the persons start walking at the same time .
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let a point C in between of P and Q
Then, distance AC = 4*6=24km
distance CQ = 42-24=18
Speed of second person ,
= 18/3=6
=6km/h
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