A can do a work in 14 days and working together A and B can do the same work in 10 days. In what time can B alone do the work?	Options.
A) 25 days
B) 30 days
C) 23 days
D) 35 days
E) 45 days

Rationale: work done by b in 1 day = 1 / 10 - 1 / 14 = ( 7 - 5 ) / 70 = 1 / 35 so , b alone can do the work in 35 days . answer : d
Answer: D