question_answer

Find the area of a ring whose outer and inner radii are respectively 23 cm and 12 cm.

A)  \[1125\text{ }c{{m}^{2}}\]            

B)  \[1321\text{ }c{{m}^{2}}\]   

C)                     \[1210\,\,c{{m}^{2}}\]     

D)         \[1225\,\,c{{m}^{2}}\]