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An office opens at 9 a.m. and closes at 5.30 p.m. with a lunch break of 30 minutes.

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An office opens at 9 a.m. and closes at 5.30 p.m. with a lunch break of 30 minutes. What is the ratio of lunch break to the total period in the office?

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Opening time of office = 9 a.m.

Closing time of office = 5.30 p.m.

∴ Total time period in office

= 8 hours 30 minutes

= (8 × 60 + 30) minutes = 510 minutes

The duration of lunch break = 30 minutes

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