A blueprint was using a scale of 3 cm=4.5m. find the actual length if it is 5 cm on the drawing. show work

For this case what we can do is the following rule of three:

3cm - - - > 4.5m

5cm - - - > x

Clearing the value of x we have:

x = (5/3) * (4.5)

x = 7.5 m

Answer:

the current length if it is 5 cm on the drawing is:

x = 7.5 m