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Lengkapilah tabel berikut dengan menentukan luas p...

Lengkapilah tabel berikut dengan menentukan luas permukaan dan volume bangun ruangnya.

Jawaban:

Diketahui

begin mathsize 14px style table attributes columnalign right center left columnspacing 0px end attributes row s equals 13 row t equals 12 row r equals cell square root of 13 squared minus 12 squared end root end cell row blank equals cell square root of 169 equals 144 end root end cell row blank equals cell square root of 25 end cell row blank equals 5 end table end style

begin mathsize 14px style table attributes columnalign right center left columnspacing 0px end attributes row cell text Luas permukaan end text end cell equals cell straight pi times r squared plus straight pi times straight r times straight s end cell row blank equals cell straight pi times straight r open parentheses straight r plus straight s close parentheses end cell row blank equals cell 3 comma 14 times 5 open parentheses 5 plus 13 close parentheses end cell row blank equals cell 282 comma 6 end cell end table end style

Jadi, luas permukaan kerucut adalah begin mathsize 14px style 282 comma 6 space text cm end text squared end style.

begin mathsize 14px style table attributes columnalign right center left columnspacing 0px end attributes row cell text Volume end text end cell equals cell 1 third times text Luas alas end text times t end cell row blank equals cell 1 third times straight pi times straight r squared times t end cell row blank equals cell 1 third times 3 comma 14 times 5 squared times 12 end cell row blank equals 314 end table end style

Jadi, volume kerucut adalah begin mathsize 14px style 314 space text cm end text squared end style.

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