sebuah balok memiliki luas sisi masing masing 20cm2 , 30cm2, dan 6cm2. volume balok tsb adalah...cm3 *20cm persegi 30cm persegi 6 cm persegi ...cm kubik

Ket :
pers. = persamaan
/ = per

L1 = p x l = 20 cm² ... pers. (1)
L2 = p x t = 30 cm² ... pers. (2)
L3 = l x t = 6 cm² ... pers. (3)

p × l = 20
p = 20/l substitusi ke pers. (2) :
p × t = 30
20/l × t = 30
20 t = 30 l
t = 3/2 l
t = 1,5 l

t = 1,5 l substitusi ke pers. (3) :
l × t = 6
l × 1,5 l = 6
1,5 l² = 6
l² = 6/1,5
l² = 4
l = 2 cm

Maka :
p = 20/l = 20/2 = 10 cm
l = 2 cm
t = 1,5 l = 1,5(2) = 3 cm

V = p × l × t
V = 10 × 2 × 3
V = 60 cm³