Question

on a blueprint of a house, 25 millimeters represents 4 meters. the actual length of the living room is 5 meters. what is its length on the blueprint?

Answer 1

Use a proportion.

25 mm is to 4 m as x mm is to 5 m

25/4 = x/5

4x = 25 * 5

4x = 125

x = 125/4 = 31.25

Answer: The length is 31.25 mm

Answer 2

First, we need to create an equation for this problem.
5(25 mm ÷ 4 m) 

Now, all you have to do is solve it. Remeber, you would start in the parenthesis using the distributive property (PEMDAS).
5(25 mm ÷ 4 m) 
5 × 6.25 = 31.25 mm

The length of the blueprint would be 31.25 millimeters. 

I hope this helps!