Answer:
156 ft³
Explanation:
Volume of the composite solid = volume of the square prism + volume of the square pyramid
✔️Volume of rectangular prism = a²h
a = 6 ft
h = 3 ft
Volume = 6²*3 = 36*3
Volume = 108 ft³
✔️Volume of square pyramid = ⅓(a²*h)
a = 6 ft
h = 4 ft
Volume = ⅓(6²*4) = ⅓(36*4)
Volume = 48 ft³
✅Volume of the composite solid = 108 + 48 = 156 ft³