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A worker noticed that the hour hand on the factory clock had moved by $225$ degrees during her stay at the factory. For how long did she stay in the factory?

  1. $3.75$ hours
  2. $4$ hours and $15$ mins
  3. $8.5$ hours
  4. $7.5$ hours
in General Aptitude by (21.2k points) 4 29 71
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