Landmark Group
23512 Points
Joined July 2007
Now can you answer this one???
A military column of 1 km length marches with a constant speed of 6 kilometers per hour. A courier from the back of the column is sent to the head of the column by bike to deliver a massage. Arrived at the front, he
instantly returns. When he returns again at the back, the column has travelled a distance of 1 km since the start of his errand. The courier drove with constant speed.
How fast did the courier bike?