Question 347413
let the speed of 1 be x mph
the other willl be 3x
....
Time = distance / speed
cyclist 1 time = 108/x
cyclist 2  time =108/3x
.....
108/x + 108/3x = 3
324+108 / 3x= 3
432/3x=3
432=9x
x= 432/9
x=48 mph
faster cyclist = 3*48 = 144 mph