Question

if the perimeter of a semicircle Park is 72 metre find its area and radius​

Answer 1

Step-by-step explanation:

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Answer 2

Answer:

✮given question:

if the perimeter of a semicircle Park is 72 metre find its area and radius

✮requried answer:

$perimeter = \pi \: r + 2r = 72cm \\ \\ \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: = r( \frac{22}{7} + 2) = 72 \\ \\ \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: = r( \frac{22 + 14}{7} ) = 72 \\ \\ = r \times \frac{36}{7} = 72 \\ \\ = r = 14cm \\ \\ area = \frac{\pi \: {r}^{2} }{2} = \frac{22}{7} \times \frac{14 \times 14}{2} \\ \\ = 22 \times 14 \\ \\ = 308$