Units of measurement

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Across
  1. 4. kg
  2. 6. 1/2
  3. 7. g
  4. 9. 100 years
  5. 12. cm
  6. 13. 24 hours
  7. 14. 7 days
  8. 15. 60 seconds
Down
  1. 1. mm
  2. 2. 1/4
  3. 3. t
  4. 5. lb
  5. 6. 60 minutes
  6. 8. m
  7. 9. cm
  8. 10. 52 weeks
  9. 11. 10 years
  10. 15. 1000 years