A can build a wall in the same time in which B and C together can do it. If A and B together could do it in 25 days and C alone in 35 days, in what time could B alone do it? Choices:
A) 275 days	B) 178 days	C) 185 days	D) 175 days	E) 675 days

Rationale: explanation : no explanation is available for this question ! answer : d
Answer: D