Question

What is the scale of the drawing?

Answer 1

The ratio of the areas is

$16\textrm{ cm} \times 8 \textrm{ cm} : 72 \textrm{ sq m}$

$16 \times 8 \textrm{ cm}^2 : 9 \times 8 \textrm{ m}^2$

$16 \textrm{ cm}^2 : 9\textrm{ m}^2$

The scale is the ratio of the lengths, which is the square root:

$4 \textrm{ cm} : 3 \textrm{ m}$

First choice