A biologist estimates the duration of different stages of the cell cycle in a sample of actively dividing meristematic cells from an onion root tip. Out of a total of 600 cells observed under a light microscope, the number of cells in each stage was recorded as follows:
Stage of Cell CycleNumber of CellsInterphase510Prophase45Metaphase21Anaphase15Telophase9 \begin{array}{|l|c|} \hline \textbf{Stage of Cell Cycle} & \textbf{Number of Cells} \\ \hline \text{Interphase} & 510 \\ \hline \text{Prophase} & 45 \\ \hline \text{Metaphase} & 21 \\ \hline \text{Anaphase} & 15 \\ \hline \text{Telophase} & 9 \\ \hline \end{array} Stage of Cell CycleInterphaseProphaseMetaphaseAnaphaseTelophaseNumber of Cells5104521159If the total duration of the cell cycle for these cells is 20 hours, calculate the combined time, in minutes, that a cell spends in metaphase and anaphase.
36 minutes36\text{ minutes}36 minutes
72 minutes72\text{ minutes}72 minutes
180 minutes180\text{ minutes}180 minutes
1020 minutes1020\text{ minutes}1020 minutes
