I think this is the answer hope it helps
So that we do not contaminate it with microorganisms or garbage or other human stuff.
A variable is a letter so just be like
13a or something like that
Answer: 6000N/m^2
Explanation:
Weight =1500N
Area =0.5m^2
Pressure =1500/(0.5^2)
=6000N/m^2
Note: Newton is denoted by 'N' (Capital) and use '^' for powers.
