4. Find the dimensions of the least expensive rectangular box which is three times as long as it is wide and which holds 100 cubic centimeters of water. The material for the bottom costs $0.07/cm², the sides cost $0.05/cm? and the top costs $0.02/cm².

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Author:James Stewart
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Chapter1: Functions And Models
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I am unsure about how to solve the following optimization question. 

**Problem Statement:**

Find the dimensions of the least expensive rectangular box which is three times as long as it is wide and which holds 100 cubic centimeters of water. The material for the bottom costs $0.07/cm², the sides cost $0.05/cm² and the top costs $0.02/cm².

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**Explanation:**

This problem involves finding the optimal dimensions for a rectangular box given specific conditions on its proportions and a target volume. Here's the breakdown:

1. **Proportions and Volume:**
   - The box's length (L) is three times its width (W).
   - The volume of the box is 100 cubic centimeters.

2. **Cost considerations:**
   - Bottom cost: $0.07 per square centimeter.
   - Side cost: $0.05 per square centimeter.
   - Top cost: $0.02 per square centimeter.

**Objective:**

Minimize the fabrication cost while maintaining the required volume and proportions.
Transcribed Image Text:**Problem Statement:** Find the dimensions of the least expensive rectangular box which is three times as long as it is wide and which holds 100 cubic centimeters of water. The material for the bottom costs $0.07/cm², the sides cost $0.05/cm² and the top costs $0.02/cm². --- **Explanation:** This problem involves finding the optimal dimensions for a rectangular box given specific conditions on its proportions and a target volume. Here's the breakdown: 1. **Proportions and Volume:** - The box's length (L) is three times its width (W). - The volume of the box is 100 cubic centimeters. 2. **Cost considerations:** - Bottom cost: $0.07 per square centimeter. - Side cost: $0.05 per square centimeter. - Top cost: $0.02 per square centimeter. **Objective:** Minimize the fabrication cost while maintaining the required volume and proportions.
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