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Alex needs 80cm of thread for a sewing project. The thread is on a spool with a circumference of 10cm. How many times must Alex unwind the spool to get the length of thread he needs? times

Alex needs 80 cm 80 \mathrm{~cm} of thread for a sewing project. The thread is on a spool with a circumference of 10 cm 10 \mathrm{~cm} .\newlineHow many times must Alex unwind the spool to get the length of thread he needs?\newline□\square times

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Full solution

Q. Alex needs 80 cm 80 \mathrm{~cm} of thread for a sewing project. The thread is on a spool with a circumference of 10 cm 10 \mathrm{~cm} .\newlineHow many times must Alex unwind the spool to get the length of thread he needs?\newline□\square times
  1. Spool Circumference: We know the circumference of the spool is 10 cm10\,\text{cm}. This means each unwind gives 10 cm10\,\text{cm} of thread.
  2. Thread Length Needed: Alex needs 80 cm80\,\text{cm} of thread for the project.
  3. Calculate Unwinds: To find out how many times Alex must unwind the spool, we divide the total length needed by the length of one unwind.\newlineSo, 80 cm80\,\text{cm} divided by 10 cm10\,\text{cm} per unwind.
  4. Total Unwinds: 80 cm/10 cm=880\,\text{cm} / 10\,\text{cm} = 8 times.\newlineAlex must unwind the spool 88 times to get the length of thread he needs.

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