A software programmer does 20% of the work in 80% of the time, and 80% of the work in the remaining 30% of the time. If the code he writes is X lines long and he was given one month (30 days) to accomplish the task, then, assuming that the programmer works at a constant rate in each of the two stages, How many lines of code were written in the last two weeks, in terms of X?
Choose the correct option: A) 13x /15 B) 15x/15 C) 7x/15 D) 2x/30 E) 13x/30
Take X=30 lines   80% of 30 = 24 lines   20% of 30 = 6 lines   W - R - T   6 lines - r1 - 24 (first 80% of the 30 days)   24 lines - r2 - 6 ( last 20% of the 20 days)   r1 = 1/4r2 = 4   Now Work in last 14 days = 6 days programmer worked at r2 + 8days programmer worked at r1   =&gt; 6 * 4 + 8 * 1/4 = 24 + 2= 
<gadget id="calculator">24 + 2</gadget>
<output>26</output>
26   Insert, X=30 in all options =&gt; 13x/30 is the answer.
<result>E</result>
A software programmer does 20% of the work in 80% of the time, and 80% of the work in the remaining 30% of the time. If the code he writes is X lines long and he was given one month (30 days) to accomplish the task, then, assuming that the programmer works at a constant rate in each of the two stages, How many lines of code were written in the last two weeks, in terms of X?