if the circumference of the base of a right circular cylinder is 110cm, then find its base area

CIRCUMFERENCE = 2 PI X R
                        2 x 22/7 x r = 110
                           r = 110/2 x 7/22
                            r = 17.5
area= pi r x r
       = 22/7 x 17.5 x17.5
      =  962.5 cm sq.
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circumference =  2πr2

                           110 =2 x 22/7 x r 

                           r = 110/2 x 7/22

                            r = 17.5
area= πr2
       = 22/7 x 17.5 x17.5

      =  962.5 cm sq.

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f the circumference of the base of a right circular cylinder is 110 cm, then find its base area.
 
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