Question

If theperimeter of sei circlear protractor is 36 cm . Find the diameter

Answer 1

perimeter of semi circle

$\frac{1}{2}2 \pi \: r \\ \frac{22}{7} \times r = 36 \\ r = 36 \times \frac{7}{22} \\ \: = 11.45 \\ diameter \: = 2(11.45) \\ = 22.90 \: cm$

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