Question

A can dig a tranch in 1 hour and b can dig similar tranch in 1 1/4 hour . In how many days 72 tranch will be dug by a and b togather by doing 8 hour every day ?

Answer 1

can dig it in 8 days . They dug the trench together and received Rs.1120 for it . ... A will dig= 1/6 trench. In 8 days B can dig = 1 trench in 1 day B will dig= 1/8 trench