A can do a piece of work in 4 hours, B and C together can do it in 3 hours , while A and C together can do it in 2 hours. How long will B alone take to do it?

Question

A can do a piece of work in 4 hours, B and C together can do  it in 3 hours , while A and C together can do it in 2 hours. How long will B alone take to do it?

Accepted Answer

সঠিক উত্তর: 12 hours। ব্যাখ্যা: