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3 votes
A full sleep cycle lasts about

A) 30 minutes.
B) 60 minutes.
C) 90 minutes.
D) 120 minutes.

1 Answer

5 votes
I'm pretty sure it's C) 90 minutes.

Broken down into 65 minutes of normal, non-REM sleep, 20 minutes of REM sleep and 5 minutes of non-REM sleep.

Hope this helped :)
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