(no subject)
Slow Stan, Mad Malcolm and Fast Freddie all decide to have a cart race - 3 laps around a 360 metre track. Malcolm is so sure of himself, he decides he'll let Stan get 120 metres round before he starts. Freddie is even more confident - he gives Stan a 240 metre head start.
The all line up at the start; the flag drops, and Stan is away! He reaches the 120 metre mark 15 seconds into the race, and then the competition starts as Malcolm sets off. Soon after Freddie zooms into action, and overtakes Stan 70 seconds into the race. Stan is further dejected to notice Malcolm shooting past 9 seconds after that, and Malcolm then goes on to win.
If all drivers were driving the same way round the track at their cart's constant full speed, how fast (in metres per second) was Malcolm going?