What struck me from the first moment was the fact that computer X processes files TWICE as fast as computer Y. Use this to solve your problem in a matter of seconds. This means that while X processes 160 files, Y will process only 80 files. This means that the time you're looking for is the time it takes X to process 160 files.
240 files.............4 hours
160 files.............x hours
x = 160*4/240 = 16/6 = 2 hrs 4/6 = 2hrs and 40 mins.
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could someone explain this also?
Source: Beat The GMAT — Problem Solving |
Here is my take on it,
X produces 60 files per hour
Y Produces 30 files per hour
Working together they will produce 90 files per hour
90 files = 1 hour
240 files = 240 /90 hours = 2 hrs 40 min
X produces 60 files per hour
Y Produces 30 files per hour
Working together they will produce 90 files per hour
90 files = 1 hour
240 files = 240 /90 hours = 2 hrs 40 min
