Explanation:
In the side view diagram, we can see that the tank, the wall, and the floor form a right triangle with the radius of the tank as the hypotenuse. Let x be the distance between the tank and the wall, as shown below:
```
|\
| \
r | \ x
| \
|_ _\
s
```
Using the Pythagorean theorem, we can write:
r^2 = x^2 + s^2
Rearranging this equation, we get:
x^2 = r^2 - s^2
Subtracting r^2 from both sides, we get:
x^2 - r^2 = -s^2
Multiplying both sides by -1, we get:
s^2 - x^2 = 0
Therefore, the equation for the relationship between the two radii is:
s^2 - x^2 = 0
Simplifying this equation, we get:
s^2 = x^2
or
x^2 = s^2
So, there is a zero on one side of the equals sign.