Answer:
3
Step-by-step explanation:
The shape is a triangular prism.
The volume of a triangular prism is the area of cross section times length.
Area of cross section is the area of a triangle.
15 × x × 1/2
15/2x
The length is 8 cm.
15/2x × 8
120/2x
The volume is given.
120/2x = 180
60x = 180
x = 180/60
x = 3
