The diameter of a semi circle is 5.6 m. What is its perimeter (in m, correct to one decimal place)? (Take $ \pi = \frac{22}{7}$)
Answer & explanation
Correct answer: option 3
We know that,
Circumference of a semicircle = πr + 2r
We have,
Diameter of a circle = 5.6m
Then, Radius of semicircle = 5.6/2 = 2.8 m
Circumference of a semicircle = 22/7 × 2.8 + 2 × 2.8 = 14.4 m