Question

donald can do a work in 8 days and mike can do in 12 days how many days will it take to finish the work if they work on alternate days​

Answer 1

Step-by-step explanation:

40 I think 40 should be the correct answer

Answer 2

Answer:

$9 \frac{3}{5} days$

Step-by-step explanation:

Donald can do a work in 8 days.

   So, Donald can do 1/8 of work in 1 day.

Mike can do in 12 days.

   So, Mike can do 1/12 of work in 1 day.

Since they work on alternate days:

Donald does 1/8 of work in 2 days.

Mike does 1/12 of work in 2 days.

Work done in 2 days is 1/8 + 1/12 = 5/24 of work.

Average work done in one day is 5/48.

So total work will be done in 48/5 = 9 3/5 days