Question

a 40 N block exerts 20 Pa of pressure on a table. What is the area of the block that is touching the table?

Answer 1

Pressure is defined as a ratio between force and area at which force is acting:

$pressure= \frac{force}{area}$

Now we solve this formula for area and we can calculate it.
$area= \frac{force}{pressure} \\ area= \frac{40}{20} \\ area=2 m^{2}$