History of 3.9.21

Revisions on August 25, 2026

• Edits to “Solution”, “Answer”, “Derivation of the formula for the speed ”

  Valter Aug 25, 2026, 1:02 PM
  +41 −0 #20314
• Edits to “Statement”, “Answer”

  Valter Aug 25, 2026, 9:41 AM
  +0 −10 #20304
• New solutionnew solution

  Valter Aug 25, 2026, 9:38 AM
  +56 −0 #20303