A and B together can do a work In 8 days. A alone can do it in 12 days. What time B will take to do the work alone? Choose the correct choice from the following options.
A) 6 days B) 8 days C) 12 days D) 24 days E) 25 days

Rationale: "explanation : a and b 1 day ' s work = 1 / 8 a alone can do 1 day ' s work = 1 / 12 what time b will take to do the work alone ? b = ( a + b ) - a = ( 1 / 8 ) - ( 1 / 12 ) = 24 days answer : option d"
Answer: D