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=
=
=10√3 cm
volume = luas alas x tinggi
= (1/2 x 20 x 10√3) x 24
= 2400√3 cm³
luas permukaan = (luas alas x 2) + 3 x luas persegi panjang
= 200√3 + 3 x 20 x 24
= (200√3 + 1440) cm