24 hrs of outage is required or are required?

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24 hrs of outage is required or are required?

asked May 02 '13 at 20:41 gramboy New member

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The full context would make it more clear, but since the time span seems to be a single unit, I would go with 'is required'.  You can eliminate the decision by rewording: An outage of 24 hours is required. I would also spell out 'hours'.

link comment answered May 02 '13 at 20:57 Lewis Neidhardt Grammarly Fellow

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