Math Problem Statement

It takes a tailoring firm 2 hours cutting and 4 hours of sewing to make a knit suit, to make a worsted suit, it takes 4 hours of cutting and 2 hours of sewing. At most, 20 hours per day are available for sewing. The profit on knit suit is $31. How many kinds of suit should be made to maximize profit? What is the maximum profit?

Solution

The problem in the image involves a tailoring firm that makes two types of suits: knit suits and worsted suits. Here's the breakdown of the scenario:

  • Knit suit: Requires 2 hours of cutting and 4 hours of sewing.
  • Worsted suit: Requires 4 hours of cutting and 2 hours of sewing.
  • Time constraints: At most, 20 hours per day are available for sewing.
  • Profit: The profit on each knit suit is $31.

The question asks: How many suits of each type should be made to maximize profit?

This is a typical linear programming problem, where we need to maximize profit subject to time constraints for both cutting and sewing.

Defining variables:

  • Let xx be the number of knit suits produced.
  • Let yy be the number of worsted suits produced.

Constraints:

  1. Cutting time: The total cutting time must not exceed the available time for cutting. Each knit suit takes 2 hours to cut, and each worsted suit takes 4 hours. Therefore, the constraint for cutting is: 2x+4y(Available cutting hours)2x + 4y \leq \text{(Available cutting hours)} Since no cutting hours were provided, we assume this constraint is irrelevant or unspecified for now.

  2. Sewing time: The total sewing time must not exceed the available sewing time, which is 20 hours. Each knit suit takes 4 hours to sew, and each worsted suit takes 2 hours to sew. Therefore, the constraint for sewing is: 4x+2y204x + 2y \leq 20

  3. Non-negativity: We cannot produce a negative number of suits: x0,y0x \geq 0, \quad y \geq 0

Objective Function:

  • The objective is to maximize profit, which is 31x31x for knit suits. The profit on worsted suits isn't provided, so we assume it is zero or that we need to optimize just the knit suits.

The objective function to maximize is: P=31xP = 31x

Would you like me to continue and solve this linear programming problem using these assumptions?

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Math Problem Analysis

Mathematical Concepts

Linear Programming
Optimization
Inequalities

Formulas

Objective function: P = 31x
Constraints: 4x + 2y ≤ 20
Non-negativity: x ≥ 0, y ≥ 0

Theorems

Linear Programming Theorem
Simplex Method

Suitable Grade Level

Grades 10-12