Tentukan luas permukaan dan volume bangun ruang ga...

Tentukan luas permukaan dan volume bangun ruang gabungan berikut.

Jawaban:

$begin mathsize 14px style table attributes columnalign right center left columnspacing 0px end attributes row cell Luas space Balok space straight I end cell equals cell 2 left parenthesis p l plus p t plus l t right parenthesis minus left parenthesis l apostrophe t apostrophe right parenthesis end cell row blank equals cell 2 left parenthesis 7 cross times 10 plus 7 cross times 9 plus 10 cross times 9 right parenthesis minus left parenthesis 10 cross times 4 right parenthesis end cell row blank equals cell 2 left parenthesis 70 plus 63 plus 90 right parenthesis minus 40 end cell row blank equals cell 406 space cm squared end cell row blank blank blank row cell Luas space Balok space II end cell equals cell 2 left parenthesis straight p apostrophe straight l apostrophe plus straight p apostrophe straight t apostrophe plus straight l apostrophe straight t apostrophe right parenthesis minus left parenthesis straight l apostrophe straight t apostrophe right parenthesis end cell row blank equals cell 2 left parenthesis 8 cross times 10 plus 8 cross times 4 plus 10 cross times 4 right parenthesis minus left parenthesis 10 cross times 4 right parenthesis end cell row blank equals cell 2 left parenthesis 80 plus 32 plus 40 right parenthesis minus 40 end cell row blank equals cell 264 space cm squared end cell row blank blank blank row cell Luas space gabungan end cell equals cell 406 plus 264 end cell row blank equals cell 670 space cm squared end cell row blank blank blank row cell Volume space straight I end cell equals cell p cross times l cross times t end cell row blank equals cell 7 cross times 10 cross times 9 end cell row blank equals cell 630 space cm cubed end cell row cell Volume space II end cell equals cell p apostrophe cross times l apostrophe cross times t apostrophe end cell row blank equals cell 8 cross times 10 cross times 4 end cell row blank equals cell 320 space cm cubed end cell row cell Volume space gabungan end cell equals cell 630 plus 320 end cell row blank equals cell 950 space cm cubed end cell end table end style$

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