Question

On the blueprint of a house, 38 millimeters represents 6 meters. the length of the living room is 57 millimeters on the blueprint. what is the actual length of the living room ?

Answer 1

For this case we can make the following rule of three:
 38 milimeters ---------> 6 meters
 57 milimeters ---------> x
 Clearing x we have:
 x = (57/38) * (6)
 x = 9 meters
 Answer:
 the current length of the living room is:
 x = 9 meters