If the Wich drum diameter is 6m calculate how far the cage will drop for each single rotation of the drum us the formula C = ttr

Answer 1

I suppose tt is supposed to represent π

In that case your formula is incorrect
C = 2πr or C = πD, where D is the diameter. You have the diameter.

So the cage would drop by the length of the circumference, which is
6π cm or appr 18.85 cm