Direct answers for specific "Solid Paper" geography workbooks aren't readily available as a standard series in major Russian educational portals. However, "Solid Paper" might refer to the of popular 6th-grade geography workbooks used in schools.

: Often used in schools following the "Russkoe Slovo" program. Solutions are available on Euroki.

: Commonly used in Belarusian schools. You can check Resheba.me for these specific practical tasks.

If you are looking for help with 6th-grade geography practical tasks, here are the most likely sources based on common school programs: