Problema Solution
If the speed of a new locomotive were 10km/h faster than that of an old model, then the journey between two stations 100km apart would be shortened by 30 minutes. Determine the speed of the newer model
Answer provided by our tutors
let speed of old model =x
New model speed = x +10
Distance = 100km
So the equation would be
100/x - 100/(x+10) = 1/2
x2 + 10x -2000 =0
x = 40
newer model speed = 50 km/hr