TASK DEFINITION: The task is to generate the correct answer for a given math problem.
PROBLEM: Problem: the length of a rectangle is increased by 15 % and its breadth is decreased by 20 % . what is the effect on its area ?

SOLUTION: 920

PROBLEM: Problem: how much interest will $ 8,000 earn in 9 months at an annual rate of 6 % ?

SOLUTION: $ 360

PROBLEM: Problem: two trains of equal are running on parallel lines in the same direction at 18 km / hr and 36 km / hr . the faster train passes the slower train in 36 sec . the length of each train is ?

SOLUTION:
25