1. I assume that you want to calculate the draught of a sphere floating in a liquid.

2. Consequently ds means density of solid and

dL density of liquid.

3. If so: Plug in all given values:

which simplifies to

Since the density of the liquid is nearly 3 times larger than the density of the solid the value of h must be smaller than the length of the radius.

4. I used Newton's method to get an approximate value for h:

Start with .

After 3 steps you'll get the value of h with an accuracy of 9 digits.