A semicircular shaped window has diameter of 63cm. Its perimeter equals	Select:
A) 162
B) 766
C) 298
D) 277
E) 198

Rationale: explanation : perimeter of window = { \ color { blue } \ pi } r + 2 r = [ { ( 22 / 7 ) * ( 63 / 2 ) } + 63 ] = 99 + 63 = 162 cm answer : a ) 162
Answer: A