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-Dominant- [34]
2 years ago
8

An architect makes a model of a new house. The model shows a tile patio in the backyard. In the​ model, each tile has length

Advanced Placement (AP)
1 answer:
STALIN [3.7K]2 years ago
7 0

Answer:

Ratio = \frac{1}{16} ----- Model length to Actual length

Ratio = \frac{1}{256} ----- Model Area to Actual Area

Explanation:

Given

Model Measurement:

Length = \frac{1}{2}\ in

Width = \frac{1}{6}\ in

Actual Measurement:

Length = \frac{2}{3}\ ft

Width = \frac{2}{9}\ ft

Solving (a): Ratio of actual length to model length

Convert length from feet to inches

Length = \frac{2}{3}\ ft

Length = \frac{2}{3}\ * 12in

Length = \frac{24\ in}{3}

Length = 8\ in

The required ratio is calculated by dividing the model length by the actual length

Ratio = \frac{Model}{Actual}

Ratio = \frac{1}{2}\ in/8\ in

Ratio = \frac{1}{2}/8

Ratio = \frac{1}{2} * \frac{1}{8}

Ratio = \frac{1}{16}

Another possible way is to convert both measurement to a different unit:

Convert model length from inches to cm

Length = \frac{1}{2}\ in

Model\ Length = \frac{1}{2} * 2.54cm

Model\ Length = \frac{1 * 2.54cm}{2}

Model\ Length = \frac{2.54cm}{2}

Model\ Length = 1.27 cm

Convert actual length from ft to cm

Length = \frac{2}{3}\ ft

Actual\ Length = \frac{2}{3} * 30.48cm

Actual\ Length = \frac{2 * 30.48cm}{3}

Actual\ Length = \frac{60.96cm}{3}

Actual\ Length = 20.32cm

Then calculate the ratio as:

Ratio = \frac{Model}{Actual}

Ratio = \frac{1.27cm}{20.32cm}

Ratio = \frac{1.27}{20.32}

Simplify fraction

Ratio = \frac{1.27/1.27}{20.32/1.27}

Ratio = \frac{1}{16}

Solving (b): Model of Area;

Way 1:

In (a), we calculated the ratio of length to be:

Ratio = \frac{1}{16}

This is also the model of the width.

So, Ratio of Area is then calculated as:

Ratio = \frac{1}{16}^2

Ratio = \frac{1}{256}

Way (2): We calculate the actual area of the model and actual measurements.

Model Measurements

Length = \frac{1}{2}\ in

Width = \frac{1}{6}\ in

Area = Length * Width

Area = \frac{1}{2} * \frac{1}{6} in^2

Area = \frac{1}{12}\ in^2

Actual Measurements

Length = \frac{2}{3}\ ft

Width = \frac{2}{9}\ ft

Area = Length * Width

Area = \frac{2}{3} * \frac{2}{9} ft^2

Area = \frac{4}{27} ft^2

Convert to in^2

Area = \frac{4}{27} * 144in^2

Area = \frac{4}{3} * 16in^2

Area = \frac{64}{3}in^2

Ratio is then calculated as:

Ratio = \frac{Model}{Actual}

Ratio = \frac{1}{12}/\frac{64}{3}

Ratio = \frac{1}{12} * \frac{3}{64}

Ratio = \frac{1}{4} * \frac{1}{64}

Ratio = \frac{1}{256}

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