Question

a can do a pice of work in 15 days and b can do the same work in 10 days if a and b work together in how many days will they complete the work

Answer 1

Since a and b has to work together.
So, they will take their own time.
Therefore, both will do half part each.

Time taken by A= 15 days
Time taken to do half= 15/2=7.5 days

Time taken by B= 10 days
Time taken to do half=10/2=5 days

Total time= 7.5+5=12.5 days