Math Problem Statement

solve

A scale drawing for a plot of land is shown below. In the drawing, 2 cm represents 3 m. Assuming the backyard is rectangular, find the area of the real backyard.

Solution

To solve for the area of the real backyard, we need to understand the scaling and calculate the dimensions in real measurements.

Step-by-Step Solution

  1. Identify the scale: According to the problem, 2 cm in the drawing represents 3 m in real life.

  2. Calculate the real dimensions of the backyard:

    • In the drawing, the width of the backyard is 2 cm.
      • Using the scale, this becomes: Real width=2 cm×3 m2 cm=3 m\text{Real width} = \frac{2 \text{ cm} \times 3 \text{ m}}{2 \text{ cm}} = 3 \text{ m}
    • The height of the backyard in the drawing is 4 cm.
      • Using the scale, this becomes: Real height=4 cm×3 m2 cm=6 m\text{Real height} = \frac{4 \text{ cm} \times 3 \text{ m}}{2 \text{ cm}} = 6 \text{ m}
  3. Calculate the area of the real backyard:

    • Area = Real width ×\times Real height Area=3 m×6 m=18 m2\text{Area} = 3 \text{ m} \times 6 \text{ m} = 18 \text{ m}^2

Answer

The area of the real backyard is 18 m².

Would you like further details, or do you have any questions?


Here are five related questions to expand on this topic:

  1. How would the area change if the backyard width in the drawing was increased to 3 cm?
  2. What would the area be if the drawing scale changed to 1 cm representing 1 m?
  3. How do we calculate area when the shape is not rectangular?
  4. How can we apply similar scaling techniques in real-world engineering problems?
  5. How would the calculations change if we measured in feet instead of meters?

Tip: When using scale drawings, always double-check that all measurements are converted properly based on the given scale.

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Math Problem Analysis

Mathematical Concepts

Ratios and Proportions
Area Calculation
Scale Drawing

Formulas

Area of rectangle = width × height
Proportion formula: (Drawing dimension / Real dimension) = Scale

Theorems

Proportionality Theorem
Area Theorem for Rectangles

Suitable Grade Level

Grades 6-8