The task is to generate the correct answer for a given math problem.

[Q]: Problem: the mean daily profit made by a shopkeeper in a month of 30 days was rs . 350 . if the mean profit for the first fifteen days was rs . 255 , then the mean profit for the last 15 days would be
[A]: rs . 445


[Q]: Problem: what is the 149 th digit to the right of the decimal point in the decimal form of 30 / 33 ?
[A]: 9


[Q]: Problem: a train traveling at 100 kmph overtakes a motorbike traveling at 64 kmph in 40 seconds . what is the length of the train in meters ?
[A]:
400 meters