8. A factory requires 42 machines to produce a given number of articles in 63 days. How many machines would be required to produce the same number of articles in 54 days?
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49 machines
no. of articles can be produced in 63 days by 42 machines = 63 * 42 = 2646 articles
same articles produced in 54 days by = 2646/54
49 machines
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