Is it possible to slide down the cylinder part of the tower?
The upper part of the tower is cylinder, that is the only challenge. I wonder if they could use this technique to slowly slide down:
https://qph.fs.quoracdn.net/main-qimg-13533a9aa6ff267ff0f558637155c6fe-c
For safety, they should go down part by part:
Step 1. Tie one end of the rope tightly to the cylinder
Step 2. One girl slides down one foot and ties the other end of the rope to the cylinder
Step 3. The other girl above loosens the top node and slides to the bottom node.
Step 4. Repeat Step 2