Question

Max builds rail fences. For one one style of fence, each section use 3 vertical fence post and 6 horizontal rails. How many rails does he need for a fence that has 18 post?

Answer 1

Answer: For a fence that has 18 posts he needs 36 rails.

Explanation:

Hi, to answer this question we have to use proportions:

Each section use 3 vertical fence post and 6 horizontal rails

The proportion is = 3 post /6 rails

For 18 posts:

18 posts / x rails.

3 /6 = 18 /x

Solving for x:

x = 18 / (3/6)

x = 36 rails

For a fence that has 18 posts he needs 36 rails.

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