Question

n p can 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​

Answer 1

Answer:

6 days

Step-by-step explanation:

A & B complete : 4days

A & B one day work : 1/4 part

A completes :12days

A's one day work : 1/12 part

B's one day work : (both one day work) - (A's one day work)

B's one day work : (1/4) - (1/12) = 1/6 part

B alone completes : 1/(1/6) : 6days

Answer 2

Correct Question :-

A and B can 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 ?

Answer :-

B can do the same work in 6 days.

Solution :-

A and B can complete a work in 4 days

So, A and B one day work = 1/4

A alone can complete the same work in 12 days

So A's one day work = 1/12

We know that

B's one day work = A and B one day work - A's one day work

= 1/4 - 1/12

= (3 - 1)/12

= 2/12

= 1/6

B's one day work = 1/6

So B can do the same work in 6 days.