How fast does det cord burn?

Detonating cord, or det cord, typically burns at a speed of approximately 21,000 feet per second (about 6,400 meters per second). This rapid burn rate allows it to effectively transmit a detonation signal to explosives over a distance. The exact speed can vary depending on the specific type of det cord and its construction. It's important to handle det cord with caution due to its explosive nature.