Math Problem Statement
Solution
The problem in the image is about a cuboid with a square base of side cm, and you need to find based on the conditions provided:
- Height of the cuboid: The height is less than cm.
- Total length of the edges: The sum of all the edges of the cuboid is 92 cm.
- Shortest path for an ant: The ant crawls from vertex A to vertex B on the surface of the cuboid, and the length of the shortest path is 17 cm.
Let's break this down:
1. Total edge length
For a cuboid, the total length of all the edges is given by:
Here, the cuboid has a square base, so the length and width are both , and the height is . The total edge length is:
We are given that the total length of the edges is 92 cm:
Dividing both sides by 4:
2. Shortest path length
The ant travels from vertex A to vertex B on the surface. If the ant crawls along the cuboid, the shortest path from one vertex to another on a cuboid typically involves flattening part of the surface.
For a cuboid with a square base, the shortest path on the surface can be calculated by unfolding the cuboid. This is a classic problem where the shortest path is the diagonal across a rectangular face formed by two sides of the cuboid. In this case, the sides involved in the path are (the side of the base) and (the height).
The length of the diagonal (shortest path) is given by:
3. Solving the system of equations
We now have two equations:
Let's solve these step by step.
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Math Problem Analysis
Mathematical Concepts
Geometry
Cuboids
Pythagorean Theorem
Surface Area
Formulas
Total length of edges of cuboid: 4(2x + h) = 92
Shortest path on the surface (diagonal): sqrt(x^2 + h^2) = 17
Theorems
Pythagorean Theorem
Suitable Grade Level
Grade 9-10
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