Question

A can complete the work in 6 days . A & B working together can complete the work in 4 days . How long would B alone take to complete the work .

Answer 1

A-6 days
A+B-4 days
B would take- 1/4-1/6=3-2/12=1/12
12 days

Answer 2

SOLUTION =>
A can complete work in =6 dys
A and B can together do the work in 4 days 
B can complete work in = 1/4-1/6= 3-2/12
= 1/12 
 hence B can complete work in 12 days
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