A lady starts from P towards Q and realizes that at a point R, if he walks 50 km further he will be at a point S, which is as far away from R as it is from Q. What is the distance between P and Q if the distance between P and R is half the distance from R to Q?( Assume that P, Q, R and S are all on the same straight line)
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The answer is 100 Km. by friend
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p-------------R-----------------S--------------Q
50. 50. 50
50+50+50=150
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