A and B can finish a work in 16 days while A alone can do the same work in 24 days. In how many days B alone will complete the work?
Choose the correct choice from the following choices:  A) 76 days  B) 48 days  C) 98 days  D) 31 days  E) 22 days

Rationale: "b = 1 / 16 – 1 / 24 = 1 / 48 = > 48 days answer : b"
Answer: B