PQR is the diagram of a semicircle RSP with centre at Q and radius of length 3.5cm. If QPT = 60

^{o}. Find the perimeter of the figure PTRS. (pi) = (frac{22}{7})-
**A.**

25cm -
**B.**

18cm -
**C.**

36cm -
**D.**

29cm -
**E.**

25.5cm

##### Correct Answer: Option A

##### Explanation

Circumference of PRS = (frac{pi}{2}) = (frac{22}{7}) x (frac{7}{1}) x (frac{1}{2})

= 11cm

Side PT = 7cm, Side TR = 7cm

Perimeter(PTRS) = 11cm + 7cm + 7cm

= 25cm