Question

a and b can together complete a piece of work on 4days if a alone can complete the same work on 12days in how much days can b alone complete that work​

Answer 1

Answer:

• (A + B) can complete = 4 days
• A can complete = 12 days
• B can complete = ?

$\underline{\bigstar\:\textsf{According to the given Question :}}$

$:\implies\sf B=\dfrac{A \times (A+B)}{A-(A+B)}\\\\\\:\implies\sf B=\dfrac{12 \times 4}{12-4}\\\\\\:\implies\sf B=\dfrac{12 \times 4}{8}\\\\\\:\implies\sf B=\dfrac{12}{2}\\\\\\:\implies\sf B = 6 \:Days$

⠀

$\therefore\:\underline{\textsf{B can alone complete work in \textbf{6 Days}}}.$

Answer 2

Answer:

6 days

Step-by-step explanation:

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