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

Input: Consider Input: Problem: if there are 200 questions in a 3 hr examination . among these questions are 100 type a problems , which requires twice as much as time be spent than the rest of the type b problems . how many minutes should be spent on type a problems ?

Output: 120 mi


Input: Consider Input: Problem: a square with sides of 15 units each . what would be the area of the square . consider a square as a combination of two right angled triangles .

Output: 225', 'd ) 81', 'e ) 144'


Input: Consider Input: Problem: when the price of a product was decreased by 20 % , the number sold increased by 60 % . what was the effect on the total revenue ?


Output: 28 %