The Bacteria
Algebra
Level
2
A Bacteria divides every 2 minutes, and fills a Petri dish in an hour. how many minutes does it take for the bacteria to fill up half of the Petri dish?
The answer is 58.
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1 solution
If the bacteria divides every two minutes, then two minutes before there were only half of the bacteria. Theoretically then the bacteria will fill the dish in 60-2 minutes, which is 58.