Given a math problem with context and a question and 5 answer choices, the task is to provide the correct answer choice based on the problem. You must choose one of the given answer choices by letter: a, b, c, d, or e; anything else is invalid.

[EX Q]: Problem: the product of two positive integers is 675 and their difference is 2. what is the bigger number ?
Options: a. 21, b. 23, c. 25, d. 27, e. 29
[EX A]: d

[EX Q]: Problem: an assembly line produces 15 cogs per hour until an initial order of 60 cogs is completed. the speed of the assembly line is then immediately increased so that it can produce 60 cogs per hour until another 60 cogs are produced. what is the overall average output, in cogs per hour, for the assembly line during this whole time ?
Options: a. 20, b. 22, c. 24, d. 26, e. 28
[EX A]: c

[EX Q]: Problem: the length of a rectangular floor is more than its breadth by 200 %. if rs. 300 is required to paint the floor at the rate of rs. 5 per sq m, then what would be the length of the floor ?
Options: a. 65, b. 13.42, c. 18, d. 16, e. 14
[EX A]:
b