The ratio of the first and second class fares between two

The ratio of the first and second class fares between two stations is 4 : 1 and that of the number of passengers travelling by first and second class is 1 : 40. If Rs. 1100 is collected as fare, the amount collected from first class passengers is ?

Ratio of amounts collected from 1st and 2nd class = (4 x 1 : 1 x 40) = (1 : 10)
∴Amount collection as 1st class fare = Rs. (1100 x 1/11) = Rs.100