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In one hour eyes blink 900 times. Assuming constant rate of eye blink each hour eye will blink 8 times than one hour in 8 hours.

Eye blink in one hour `= 900`

Eye blink in eight hours `= 900xx8 = 7200`

* So the eye will blink 7200 times approximately within 8 hours.*

Since a eye blinks 900 times a hour, to find out how many times in 8, you simply multiply by 8.

*900*8= 72,000 times a eye blinks in 8 hours*

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