Question 1181837
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(a)  P = {{{(60-2*10)*(30-2*10)/(60*30)}}} = 0.22222... = 0.2222 (rounded) = 22.22%.



(b)  P = {{{(4*((pi*10^2)/4))/(60*30)}}} = {{{(pi*10^2)/(60*30)}}} = {{{(3.14*100)/(60*30)}}} = 0.17444... = 0.1744  (rounded) = 17.44%.
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Solved.