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In a lake, there is a patch of lily pads. Every day, the patch doubles in size. If it takes 48 days for the patch to cover the entire lake, how long would it take for the patch to cover half of the lake?
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In a lake, there is a patch of lily pads. Every day, the patch doubles in size. If it takes 48 days for the patch to cover the entire lake, how long would it take for the patch to cover half of the lake?

User Khanh Pham
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2 Answers

3 votes
If the lily pad patch doubles every day, and it's covering the entire lake on the 48th day, then the day before it must have been covering half of the lake. It would take 47 days for the patch to cover half of the lake.
User Ivan Zamylin
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9.1k points
4 votes
it is half full on day 47
every day it doubles
so on day 48 it is full
User Raul Cuth
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7.7k points
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