Question

A and B together can do a piece of work in 12 days, while B alone can finish it in 30 days.In how many days can A alone finish the work?​

Answer 1

Step-by-step explanation:

(A + B)'s 1 days' work

= 1/12 units

B's 1 days' work = 1/30 units

let A alone can finish it in "x' days

1/x + 1/30 = 1/12

1/x = 1/12 - 1/30

1/x = 18/360

1/x = 1/ 20 => x = 20

A will finish it in 20 days Answer