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

Input: Consider Input: Problem: two trains travel in opposite directions at 36 kmph and 45 kmph and a man sitting in slower train passes the faster train in 12 seconds . the length of the faster train is

Output: 270 m


Input: Consider Input: Problem: the length of a rectangle is increased by 15 % and its breadth is decreased by 20 % . what is the effect on its area ?

Output: 920


Input: Consider Input: Problem: a man can row upstream at 25 kmph and downstream at 55 kmph , and then find the speed of the man in still water ?


Output: 40