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A scale model drawing of a room is 4 centimeters wide and 12 centimeters long. The scale model uses a scale in which 2 centimeters represents 1. 4 meters. What is the area of the actual room? 11. 76 m² 23. 52 m² 33. 6 m² 67. 2 m².

Sagot :

Ratio compares two things. The area of the room, in reality, is 23.52 m².

What is the scale ratio?

Scale ratio compares the length on the map with the length in the reality.

Given to us

Length on the map, L = 12 cm = 0.12 m

Width on the map, w = 4 cm = 0.04 m

Scale model uses a scale in which 2 centimeters represent 1.4 meters.

As it is given to us the scale model uses a scale in which 2 centimeters represents 1.4 meters. therefore,

[tex]\rm \dfrac{Scale\ Model}{Reality} = \dfrac{0.02}{1.4}[/tex]

Length in the reality,

[tex]\rm \dfrac{L}{L'} = \dfrac{0.02}{1.4}\\\\\rm \dfrac{0.12}{L'} = \dfrac{0.02}{1.4}\\\\L' = 8.4\ m[/tex]

Width in reality,

[tex]\rm \dfrac{W}{W'} = \dfrac{0.02}{1.4}\\\\\rm \dfrac{0.04}{W'} = \dfrac{0.02}{1.4}\\\\W' = 2.8\ m[/tex]

The area of the room in reality,

A = L' x W'

A = 8.4 x 2.8

A = 23.52 m²

Hence, the area of the room, in reality, is 23.52 m².

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