a scale drawing of a billboard uses the scale 4cm: 9ft. The length of the billboard in the drawing is 11cm. How long is the actual billboard.
To find the length of the actual billboard, we can use the given scale and the length of the billboard in the drawing.
We know that the scale is 4cm:9ft, which means that for every 4cm on the drawing, there are 9ft in real life.
Given that the length of the billboard in the drawing is 11cm, we can set up a proportion using the scale:
4cm / 9ft = 11cm / x ft
To solve for x (the length of the actual billboard), we cross-multiply and then divide:
4cm * x ft = 11cm * 9ft
We can simplify this equation:
4x = 99
Dividing both sides by 4:
x = 24.75
So, the length of the actual billboard is 24.75 feet.
4 cm ----> 9 ft
1 cm ----> 9/4 ft
then 11 cm ----> ??? ft
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