Math, asked by rohithandore, 10 months ago

multiple choice question
9. a railing of 288 m is required for fencing a semi-circular park. find the area of the park.​

Answers

Answered by pavanchinna40
1

Step-by-step explanation:

144x144=?that is the answer

Answered by chaitragouda8296
2

Answer:

Railing of park = Circumference of semi circular park

288 =  \frac{2\pi \: r}{2}

288 = {\pi \: r}

r =  \frac{288}{\pi}  =  \frac{288 }{ \frac{22}{7} }  = 288 \times  \frac{7}{22}  =  \frac{1008}{11}

area \: of \: semicircle \:  =   \frac{\pi \:  {r}^{2} }{2}

 \:  \:  \:  \:  \:  \:  \:  \:  \:  \:   \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \: \:  \:  =  \frac{22}{7} \times   \frac{1008}{11}  \times  \frac{1008}{11}

 \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \: \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:   \:  \:  =  \frac{2 \times 144 \times 1008}{11}  \\  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \: \:  \:  =   \frac{290304}{11} \\ \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \: \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:   = 26391.2727 \\  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  = 26391.28 {m}^{2}

Hope it's helpful to you ,.......

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