5 machines take 15 days to produce noodles; 1 machine alone would take 75 days. If 2 machines are shut down, the remaining machines can finish the job in 5 days.
(i) To complete the required production of noodles, 5 machines take 15 days. Therefore, 1 machine would take 5 times longer, which is 75 days.
(ii) If 2 machines are shut down, leaving 3 machines to work, the time taken will be 5 days to complete the production of noodles.
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