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Perhatikan gambar kerucut berikut!   Hitunglah V...

Perhatikan gambar kerucut berikut!

 

Hitunglah Volume kerucut!

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Jawaban:

Panjang jari-jari alas kerucut:

begin mathsize 14px style table attributes columnalign right center left columnspacing 0px end attributes row r equals cell square root of s squared minus t squared end root end cell row space equals cell square root of 15 squared minus 12 squared end root end cell row cell space space end cell equals cell square root of 225 minus 144 end root end cell row cell space space end cell equals cell square root of 81 end cell row cell space space end cell equals cell space 9 space cm end cell end table end style 

Volume kerucut :

begin mathsize 14px style V equals 1 third πr squared straight t space space space equals fraction numerator 1 over denominator up diagonal strike 3 end fraction cross times 3 comma 14 cross times stack up diagonal strike 9 with 3 on top cross times 9 cross times 12 space space space equals 1017 comma 36 space cm cubed end style 

 

   

 

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