Sunday, August 1, 2010

NMOS 2010 Q6














To walk on the same side, Peter would need to walk 150 m more than Queenie first.


50 – 47 = 3 m/min


3 m --> 1 min


150 m --> 150/3 x 1 = 50 min






50 m/min x 50 min = 2500 m


2500 / 300 = 8 r 100 m



To be on the same side, Peter would need to travel another 200 m more.  [since he was already 100 m on one side while Queenie was 300 m ahead (i.e. 100 m on another side of the triangle]


200 m / 50 m/min = 4 min


50 + 4 = 54 min

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