My Math Forum two questions involving geometry and algebra

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November 19th, 2018, 11:12 AM   #1
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two questions involving geometry and algebra

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November 19th, 2018, 12:31 PM   #2
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I Would be really grateful guys thanks

 November 19th, 2018, 01:56 PM #3 Senior Member   Joined: Dec 2015 From: Earth Posts: 274 Thanks: 31 As i see the rectangle is a square and there are five parts of $\displaystyle x$ Write $\displaystyle 5x=10$ and $\displaystyle x=2$ Area of circle equals $\displaystyle \pi r^2$ and area of rectangle equals $\displaystyle 24r^2$ Wasted area of metal equals $\displaystyle 24r^2 - 4\pi r^2$ $\displaystyle 24r^2 P=24r^2 - 4\pi r^2$ where P is the percentage $\displaystyle P=\frac{1144}{24} \%$
 November 19th, 2018, 07:03 PM #4 Global Moderator     Joined: Oct 2008 From: London, Ontario, Canada - The Forest City Posts: 7,885 Thanks: 1088 Math Focus: Elementary mathematics and beyond $\displaystyle \frac{5x}{10}=\frac{10}{x}$ $\displaystyle P_w=\frac{24r^2-4\pi r^2}{100}$

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