if a scale drawing says 1/5 equals 5 feet. How long is a 3 inch wall?

Question

Need the answer to the word problem in detail.

Answer 1

I'm assuming 1/5 represents 1/5 of an inch.

Let w = the length of the wall

Inches  = 1/5  = 3       Cross multiply to solve a proportion.

  Feet         5       w

1/5 w = 15     Multiply both sides by 5.

        w = 75 feet