1.

Points \[P,\,\,Q\] and \[R\] are in a vertical line such that\[PQ=QR\]. A ball at the top-most point \['P'\] is allowed to fall freely. What is the ratio of the times of descent through \[PQ\] and\[PR\]?

A. \[\frac{3}{2}\]  
B. \[\frac{3}{\sqrt{2}+1}\]
C. Almonds 
D. \[\frac{5}{2}\]
Answer» D. \[\frac{5}{2}\]


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