Sophie's bus travels 11 times as fast as Malaika's brio train.
The difference in their speed is 50/km. Find how fast Malavika's brio train runs.
Let the train's speed = T
Bus's speed = 11T
11T - T = 50
10T = 50
T = 50 / 10
T = 5 Km/h - train's speed.
5 x 11 = 55 Km/h - Bus's speed.