Question

Q3: A 36 cm long piece of wire is bent onto the form of a semicircular are bounded by its
diameter. Find the radius.​

Answer 1

Answer:

r=11.46

Step-by-step explanation:

πr=36

r=36/3.14

Answer 2

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Length of wire is in the form of semicircle.

Given, length of wire =36 cm

$\bf{Length \: of \: wire= \frac{1}{2} (2πr) + 2r}$

$\bf{36 = (π + 2)r}$

$\bf{36 = (\frac{22}{7} + 2) \times r}$

$\bf{r = \frac{36}{7}.r}$

$\bf{r = 7cm}$

So radius=7cm

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