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  • 20-04-2015
  • Mathematics
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a trampoline has an area of 49pi square feet what's the diameter of the trampoline

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  • 20-04-2015
Area of a circle is π*r²
sub what we're given 
49π= πr²
49π= π*r²
r²= 49π/π
r²=49
r=7
The diameter is twice the radius therefore the diameter is 14 units
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