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  • 18-03-2019
  • Mathematics
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Write and simplify the exact expression for the area of the sidewalk.

Write and simplify the exact expression for the area of the sidewalk class=

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rebel79
rebel79 rebel79
  • 18-03-2019
given area of small circle= πr^²= π×9×9= 81π

and area of greater circle= πr^²= π×11×11= 121π

now area of the sidewalk= area of greater circle (-) area of small circle= 121π-81π=40π

40×22/7=125.714m^²
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