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1st cone__ let slant height be l and CSA be C n radius=r _____________________ 2nd cone __slant height=2l and CSA=2C and radius=r'________ CSA of first cone/CSA of second cone==C/2C=pie*r*l/pie*r'*2l___1/2=r/r'*2___r/r'=1 ~~~r=r'
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