Ok, IF 10 machines do it in 16 hrs.
then, 1 machine would do it in 16*10 hrs.
so, 8 machines would do it in =16*10/8=20 hrs.
Amit
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Source: Beat The GMAT — Problem Solving |
So I guess the goal on these types of problems is to break it down to the equation of how many hours for 1 machine and then divide by the number of machines.
