Amit and Ananthu can do a work in 15 days and 30 days respectively. Amit started the work and left after 3 days. Ananthu took over and completed the work. In how many days was the total work completed? Choose one:
A) 28 days
B) 20 days
C) 23 days
D) 25 days
E) 27 days

Rationale: "amit ’ s one day ’ s work = 1 / 15 amit ’ s 3 day ’ s work = 1 / 15 * 3 = 1 / 5 work left = 1 - 1 / 5 = 4 / 5 ananthu ’ s one day ’ s work = 1 / 30 ananthu can do work in = 4 / 5 * 30 = 24 days so total days = 24 + 3 = 27 days answer : e"
Answer: E