Answer:
9π cm³ 
 
Step-by-step explanation: 
 
We require to find the height (h) of the cylinders 
 
The volume (V) is calculated as 
 
Ah ( A is the base area and h the height ), then 
 
3πh = 18π ( divide both sides by 3π ) 
 
 = 6 
 
Then the height of the smaller cylinder = 6 - 3 = 3 cm 
 
3π × 3 = 9π cm³ ← volume of smaller can 
 
Explanation: