TASK DEFINITION: The task is to generate the correct answer for a given math problem.
PROBLEM: Problem: a train crosses a bridge of length 200 m in 10 seconds and a lamp post on the bridge in 5 seconds . what is the length of the train in metres ?

SOLUTION: 200 m

PROBLEM: Problem: income and expenditure of a person are in the ratio 7 : 6 . if the income of the person is rs . 14000 , then find his savings ?

SOLUTION: 2000

PROBLEM: Problem: the average age of 36 students in a group is 18 years . when teacher ' s age is included to it , the average increases by one . what is the teacher ' s age in years ?

SOLUTION:
55 years