A” finishes his work in 15 days while “B” takes 10 days. How many days will the same work be done if they work together?

Question

Dva · Answer

If A takes 15 days to finish his work then,

A’s 1 day of work = 1/15

B’s 1 day of work = 1/10

Total work is done by A and B in 1 day = 1/15 + 1/10

If we use LCM(15, 10), we would get 
1 day’s work of A and B =

Emmett · Answer

would that be (2+3)/30

Dva · Answer

Yes so now 1 days of work would equal what?

Emmett · Answer

1/6?

Dva · Answer

Yes correct so if  A and B can finish the work in 6 days if they work together.