sebuah balok mempunyai sisi sisi yang luasnya 60cm2, 72cm2,dan 30 cm2. volume balok itu adalah

Misalkan :
Sisi 1 (60 cm²) = x
Sisi 2 (72 cm²) = y
Sisi 3 (30 cm²) = z

x = p × l
60 = pl …(1)

y = p × t
72 = pt …(2)

z = l × t
30 = lt …(3)

(1)
p = 60/l

(2)
60t/l = 72
5t/l = 6
5t = 6l
t = 6l/5

(3)
30 = l × 6l/5
150 = 6l²
l² = 25
l = 5 cm

l × t = 30
5t = 30
t = 6 cm

p × t = 72
6p = 72
p = 12 cm

V = p × l × t = 12 × 6 × 5 = 360 cm³