Uma can finish a work in 18 days. The same work is finished by Manju in 9 days. In how many days both of them will finish the work while working together.

A can do a piece of work in 4 days and B can do it in 12 days. In how many days will they finish the work, both working together ?

X can finish 25% of a work in a day. Y can do 12.5% of the same work in a day. In how many cays, will both of them finish the work together? A. 2.67 days B. 2.33 days C. 3.33 days D. 3.67 days

A can do (2)/(3) of a certain work in 16 days and B can do (1)/(4) of the same work in 3 days. In how many days can both finish the work, working together?