Answer:
64 m³
Step-by-step explanation:
The dotted line divides the base of the concrete into two rectangles
We can use the following information
Area of a rectangle = length x width
Volume of a solid prism = Surface area x height
One rectangle is of size 5m x 4m and its area = 5 x 4 = 20 m²
The other rectangle is of size 20m x 15m and its area = 20 x 15 = 300 m²
Total area of concrete base = 20 + 300 = 320 m²
This is the surface area of the concrete base
The concrete base has a depth of 0.2 m.
We can visualize the entire base as a composition of two rectangular prisms.
The total volume of this base = Total Surface Area x Depth
= 320 x 0.2
= 64 m³
