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Mathematics, 18.03.2021 01:00 rainbowboi

A stationery shop orders a batch of pens from a factory.
The factory could make the batch of pens in
20 days using 12 machines.
Due to a fault, only 8 machines were used for the
first 9 days.
All 12 machines were used from day 10 onwards.

Work out the total number of days taken to make
the batch of pens.

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Answers: 2

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The factory could make the batch of...
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