Respuesta :

Answer:

h = 20 cm

Step-by-step explanation:

The volume (V) of a square based prism is

V = area of base × h ( h is the height )

area of square base = 9 × 9 = 81 cm²

Hence

81h = 1620 ← equation to be solved

Divide both sides by 81

h = 20 cm