Question

if the parameter of a semi circular protector is 36 cm. find the diameter ​

Answer 1

Answer:

perimeter of semicircle= πr+ 2r perimeter is 36cm 36=22/7r+2r 36=22r+14r/ 7 36=36r/7 r=36×7/36 r=7. Diameter=2×7 =14.

Answer 2

★ǫᴜᴇsᴛɪᴏɴ:-

• If the perimeter of a semi circular protractor is 36 cm. find the diameter.

★ᴛᴏ ғɪɴᴅ:-

• Diameter

★ɢɪᴠᴇɴ:-

• Perimeter of a semi circular protractor is 36cm.

★sᴏʟᴜᴛɪᴏɴ:-

$\pi \: r + 2r = 36$

$(\pi + 2)r = 36$

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

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

$r = \frac{36 \times 7}{36}$

$= \frac{252}{36}$

$= 7$

$2\pi = 2 \times 7 = 14 \: cm$

★ᴀɴsᴡᴇʀ:-

• Therefore,the diameter is 14 cm.