Quote:
Originally Posted by tryingharder
Steve gets on the elevator at the 11th floor of a building and rides up at a rate of 57 floors per minute. At the same time Joyce gets on an elevator on the 51st floor of the same building and rides down at a rate of 63 floors per minute. If they continue traveling at these rates, at which floor will their paths cross?
(A) 19
(B) 28
(C) 30
(D) 32
(E) 44
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both are travelling in the opposit direction...net speed is 120 floors per minute
2 floors per second...in 10 seconds both would have travelled 20 floors which is 30th floor for both of them
hence C