The perimeter of a semi-circle is 56.54 cm. What is its diameter (in cm)? (Use π = 3.14)
Show answer & explanation
Correct answer: B
Explanation
The correct answer is Option 2 i.e. 22.
We know that,
Perimeter = πr + 2r
r = radius
Now,
⇒ 56.54 = 3.14r + 2r
⇒ 56.54 = 3.14r + 2r
⇒ 5.14r = 56.54
⇒ r = 11
So,
Diameter of the semi-circle = 2r = 2 × 11 = 22 cm