Question

A and B together can complete a work in 4 days . If A alone can complete the same work in 12 days . In how many days can B alone complete the same work ?​

Answer 1

Answer:

6 days

Step-by-step explanation:

$\frac{1}{4} = \frac{1}{12} + \frac{1}{x} \\ \frac{1}{4} - \frac{1}{12} = \frac{1}{x} \\ \frac{(3 - 1)}{12} = \frac{1}{x} \\ \frac{2}{12} = \frac{1}{x} \\ \frac{1}{6} = \frac{1}{x} \\x = 6 \: days$