How many minutes before 10 am is it if 90 minutes接标题…later it will be as many minutes 11 am.

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How many minutes before 10 am is it if 90 minutes接标题…later it will be as many minutes 11 am.
How many minutes before 10 am is it if 90 minutes
接标题…
later it will be as many minutes 11 am.

How many minutes before 10 am is it if 90 minutes接标题…later it will be as many minutes 11 am.
Thirty minutes.
请及时采纳,多谢!