Hello, jambanks!

Using the numbers given in your diagram,

. . the problem is quite easy.

I have a pipe 5000 mm diameter and a known length of string 59996 mm long.

How would i figure out in the diagram?Code:A * - /|\ : / | \ : / | \ : 20,974 / | \ : / | \ : / * * * \ x /* | *\ : B * | * : * * | * * : * | * : * 2500 * | * * : * * * - * O * * * * * * * * * *

We see that

In right triangle

Hence: .

Therefore: .