Question 1194228
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Since the diameter is 60 cm (given), it implies that the radius is r = 30 cm.


Now use the formulas


    circumference = {{{2*pi*r}}} = 2*3.14*30  cm;


    area = {{{pi*r^2}}} = {{{3.14*30^2}}}  cm^2.
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Happy calculations (!)