The diameter of the circle in the picture is 10 cm. The perimeter of the region marked in thick line in cms is
A. 12
B. 16
C. 20
D. 24
Answer:C
The diameter of the circle in the picture is 10 cm. The perimeter of the region marked in thick line in cms is
A. 12 B. 16 C. 20 D. 24