jika sebuah balok memiliki luas sisi masing” 30cm²dan 18cm²dan 15cm².maka hitung volume balok tersebut(!)

Pl = 30
pt = 18
lt = 15

pl. pt. lt = 30×18×15
(plt)² = 8100
V²= 8100
V=√8100
V = 90
Volume = 90 cm³

L1 = 30 cm^2
L2 = 18 cm^2
L3 = 15 cm^2

L1 = p × l
30 = pl
p = 30/l

L2 = p × t
18 = pt
p = 18/t

30/l = 18/t
30 × t = 18 × l

L3 = l × t
15 = lt
t = 15/l

30 × t = 18 × l
30 × 15/l = 18l
450/l = 18l
450 = 18l × l
450 = 18l^2
l^2 = 450/18
l^2 = 25
l = V25
l = 5 cm

p = 30/l
p = 30/5
p = 6 cm

t = 15/l
t = 15/5
t = 3 cm

V = p × l × t
V = 6 × 5 × 3
V = 90 cm^3