Question

Perbandingan p:l:t pada balok adlh 5:3:2.V=810cm3 tentukan luas permukan baloknya

Answer 1

5x.3x.2x = 810
30x^3 = 810
x^3 = 810/30
x^3 = 27
x = 3

panjang = 3. 5 = 15
lebar = 3.3 = 9
tinggi = 3.2 = 6

luas permukaan
= 2 (pl + pt + lt)
= 2 (15.9 + 15.6 + 9.6)
= 2 (135 + 90 + 54)
= 540 cm^2