25^2-24^2=(25-24)(25+24)=49
R=sqrt(49)=7 D=7*2=14
h*2pi*r=45pi
5*2*r=45
r=45/10
D=2r=9вроде так
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25^2-24^2=(25-24)(25+24)=49
R=sqrt(49)=7 D=7*2=14
h*2pi*r=45pi
5*2*r=45
r=45/10
D=2r=9
вроде так