XAT 2017 Question 61
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XAT
There are 3 parallel lines AB, CD, and EF, in that order.
Let the distance between CD and AB be 2x.
It has been given that the distance between CD and EF is x.
A quadrilateral PQRS is formed such that P is on AB, Q and S are on CD, and R is on EF.
Also, the length of SR is the least possible value it can take. Therefore, SR must be perpendicular to the parallel lines.


