Below is a sketch of the fence Scott plans to build in his backyard.(the sketch is 18.75cm. length and 8.3 repeating cm. Width)if 1cm=12ft, what are the dimensions of the actual fence?

Question

It is kinda hard to explain because there is a drawing/sketch underneath the question.

Answer 1

You are going to set up ratios -- two fractions equal to each other. The first fraction will be 1/12, standing for 1 cm = 12 ft. The second fraction will be 18.75/f, standing for 18.75 cm over f feet, since that's what you're looking for.

1/12 = 18.75/f

Now you will cross multiply. Multiply the top of the first fraction by the bottom of the second, and the bottom of the first by the top of the second.

1 x f= 1f (or just f)

12 x 18.75 = 225

f = 225. That gives you the length.

Do the same thing for width.

1/12 = 8.3/f

f= 8.3 x 12

Do the multiplication and you'll have your answer.