Raymond Lin said:eh? The question wasn't given the length of the stick nor the speed of the ants so it is impossible to work out the time..................
Pay more attention Raymond!
Suppose you have a 1-meter long stick, on which you can place ants. You can place as many (or as few) ants as you like on the stick. Each ant can be placed at any point along the stick, facing in either direction.
The ants have the following properties:
· All ants start moving at the same instant.
· All ants move at 1m/s in the direction they are facing.
· When two ants collide, both ants turn around.
· When an ant reaches either end of the stick it falls off.
When I looked at it, I thought 1 second immediately, simply because if you take the case of 1 ant starting from one end and walking to the other...
