24 September 2024 | GMAT | QUANT

A new fast growing strain of yeast cells reproduces by dividing every two minutes. Thus one becomes two after two minutes, four after four minutes and eight after six minutes. If a newly divided cell is placed in a rectangular vat 6 inches by 8 inches by12 inches, and after an hour the vat is full of yeast, how long did it take to fill half the vat?

  • A. 15 Minutes
  • B. 24 Minutes
  • C. 30 Minutes
  • D. 48 Minutes
  • E. 58 Minutes
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