The perimeter of a semi-circle is 25.7 cm. What is its diameter (in cm) ? (π = 3.14)
Answer & explanation
Correct answer: option 1
We know that,
Perimeter of a semi circle = πr + 2r
We have,
The perimeter of a semi-circle is 25.7 cm
According to the question,
πr + 2r = 25.7
r(π + 2) = 25.7
= r = \(\frac{25.7}{5.14 }\)
= r = 5
So, the diameter = 10 cm