Question

A can do a piece of work in 12 days and B can do it in 15 days how long would they take to finish the work

Answer 1

you can do piece of work in 12 days we can do in 15 days work done by a in 1 day is x divided by 12 and by b is x divided by 15 what done by them together in one day is 3x / 20 now x is the number of days in which they both will finish the work together X equals to 20 upon 3 which is 6.66 something