# Question #aff76

Sep 6, 2017

See explanation.

#### Explanation:

The dimensions are given in different units, so before any calculations we have to change either feet to inches or inches to feet.

If we change feet to inches we will have all integer dimensions:

The dimensions of drawing stay unchanged:

$6$ inches and $9$ inches.

The real dimensions after changing to inches will be:

$5 \cdot 12 = 60$ inches and $7.5 \cdot 12 = 90$ inches.

Now we can calculate the scale by dividing either 2 lower or 2 higher values:

$s = \frac{60}{6} = \frac{90}{9} = 10$.

The scale factor is $10$.