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Question Number 169973 by Best1 last updated on 13/May/22

Answered by alephzero last updated on 13/May/22

$$P_{\mathrm{a}}=P_{\mathrm{rectangle}}-a+P_{\mathrm{semicircle}}=$$$$=2(a+b)-a+\frac{\pi d}{2}=$$$$=2(1.6+2.8)-1.6+\frac{1.6\pi }{2}$$$$=7.2+0.8\pi \mathrm{m}$$$$A_{\mathrm{a}}=A_{\mathrm{rectangle}}+A_{\mathrm{semicircle}}=$$$$=ab+\frac{\pi d^2}{4}=1.6\times 2.8+\frac{1.6^2\pi }{4}=$$$$=4.48+0.64\pi {\mathrm{m}}^2$$

Commented by Best1 last updated on 13/May/22

$$whataboucde?$$

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