সব প্রশ্নে ফিরে যান
Math
A and B can together complete a piece of work in 4 days . If A alone can complete the same work in 12 days, in how many days can B alone complete that work?
A) 4 days
B) 5 days
C) 6 days
সঠিক উত্তর
D) 7 days