km8115
16.04.2020 •
Mathematics
A helicopter's rotor sweeps out an area of 121 pi square
meters. What is the diameter of the rotor?
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Ответ:
Step-by-step explanation:
It's important to notice that the area is circular, which is defined by
Replacing given values and solving for r, we have
But, the diameter is twice the radius, so
Therefore, the diameter is 22 meters.
Ответ: