A single person takes 3 minutes to write a letter. If from 10am to 12 noon, 1960 letters are to be written, how many persons should be employed on this job?
Question
A single person takes 3 minutes to write a letter. If from 10am to 12 noon, 1960 letters are to be written, how many persons should be employed on this job?
As per proportion law,
If number of persons increases the time should decrease.
=> 120 x X = 3 x 1960
Therefore X = (3x1960)/120 = 49
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