Given the three orthographic views of a solid as shown, find the volume of the solid.

Answer: The volume of the solid is 433\frac{4\sqrt{3}}{3} cubic units.

Step-by-step solution

Step 1: Analyze the orthographic views

The front view shows a trapezoid, indicating that the solid has varying depths or heights. The side view is a square with a diagonal, suggesting a prism-like structure or a wedge. The top view is an equilateral triangle with side length 2, which means the base of the solid is an equilateral triangle with side length 2.

Step 2: Determine the dimensions of the solid

From the top view, we know the base is an equilateral triangle with side length a=2a=2. From the front view, the maximum height of the solid is h=2h=2. The front view also shows that the solid can be decomposed into a triangular prism and a triangular pyramid.

Step 3: Calculate the area of the equilateral triangular base

The area of an equilateral triangle with side length aa is given by the formula A=34a2A = \frac{\sqrt{3}}{4} a^2. Substituting a=2a=2, we find the area of the base to be 3\sqrt{3} square units.

Step 4: Decompose the solid into simpler shapes

Looking at the front view, the solid can be decomposed into two parts: a triangular prism with a height of 1 unit and a triangular pyramid with a height of 1 unit. Both share the same equilateral triangular base.

Step 5: Calculate the volume of the triangular prism

The volume of a prism is calculated by multiplying its base area by its height. Here, the base area is 3\sqrt{3} and the height of this part of the solid is 1, so the volume of the prism part is 3\sqrt{3} cubic units.

Step 6: Calculate the volume of the triangular pyramid

The volume of a pyramid is one-third of the product of its base area and its height. For the pyramid part of the solid, the base area is 3\sqrt{3} and the height is 1, resulting in a volume of 33\frac{\sqrt{3}}{3} cubic units.

Step 7: Calculate the total volume of the solid

The total volume of the solid is the sum of the volumes of the triangular prism and the triangular pyramid. Adding 3\sqrt{3} and 33\frac{\sqrt{3}}{3} gives a total volume of 433\frac{4\sqrt{3}}{3} cubic units.

More from this chapter

All Surface Areas and Volumes solutions →

Solve your own maths question free →