the patch doubles in size every day. 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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day required for cover entire lake =48
therefore day required cover half lake =48/2
=24 days
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The answer is 47 days.As the patch doubles itself everyday on the 47th day it would be half of the lake and on 48 the day it would cover the complete lake .Hope you got the answer
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