Math Problem Statement

A scale on a blueprint drawing of a house shows that 10 centimeters represents 2 meters. What number of actual meters are represented by 18 centimeters on the blueprint?

Solution

The problem states that 10 centimeters on the blueprint represent 2 meters in real life, and asks how many actual meters are represented by 18 centimeters on the blueprint.

Step-by-Step Solution:

  1. First, find the scale factor. We know that 10cm10 \, \text{cm} on the blueprint represents 2m2 \, \text{m}.

    The ratio of blueprint centimeters to real meters is: 10cm2m=5cm per meter.\frac{10 \, \text{cm}}{2 \, \text{m}} = 5 \, \text{cm per meter}. This means that every 5 cm on the blueprint corresponds to 1 meter in real life.

  2. Now, to find how many meters are represented by 18 cm: 18cm5cm per meter=3.6m.\frac{18 \, \text{cm}}{5 \, \text{cm per meter}} = 3.6 \, \text{m}.

Final Answer:

The number of actual meters represented by 18 centimeters on the blueprint is 3.6 meters.

Would you like more details or have any other questions?

Here are 5 related questions to consider:

  1. How would the scale change if 10 cm represented 5 meters instead?
  2. What would 25 cm on the blueprint represent in real life using the same scale?
  3. If the scale was reversed, where 2 meters represented 10 cm, how would the blueprint distance change?
  4. How many centimeters on the blueprint would represent 5 meters using this same scale?
  5. How would this blueprint scale translate to a smaller object, like a model?

Tip: Always make sure the units in a scale problem match up correctly before solving!

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Math Problem Analysis

Mathematical Concepts

Ratios
Proportions
Scale Factor

Formulas

Scale factor = blueprint measurement / actual measurement
Actual meters = blueprint measurement / scale factor

Theorems

Proportionality Theorem

Suitable Grade Level

Grade 6-8