Question

A can work twice as fast as B . If they together complete a work in 12 days then in how many days will B alone complete this work

Answer 1

Answer:

36 days

Step-by-step explanation:

let say a takes x days

then b takes 2x days

together they take 12 days

1/12 = 1/x + 1/2x

1/12 = 3/2x

x = 18

b takes 2x = 2*18 = 36 days