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

Problem: if one - third of one - fourth of a number is 18 , then 3 - tenth of that number is : a . 35
64.8

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
270 m

Problem: the purchase price of an article is $ 48 . in order to include 5 % of cost for overhead and to provide $ 12 of net profit , the markup should be

30 %