Answer:
V = 238.875 m³
Explanation:
the U- shape tank is composed of two cuboids ( left and right) and a cube (centre )
the volume (V) of a cuboid is calculated as
V = length × width × height
the dimensions of both cuboids are
length = 4 m , width = 3.5 m , height = 7 m
V = 4 × 3.5 × 7 = 98 m³
the dimensions of the cube are
length = 3.5 m , width = 3.5 m , height = 3.5 m
V = 3.5 × 3.5 × 3.5 = 42.875 m³
the total volume (V) is the the sum of the 3 volumes
V = 98 + 98 + 42.875 = 238.875 m³