A conical flask is full of water. The flask has base radius r and height h. This water is poured into a cylindrical flask of base radius mr. The height of water in the cylindrical flask is

Product of two coprime numbers is 117. Then their LCM is

A rational number between 3/4 and 3/8 is

A does 20% less work than B. If A can complete a piece of work in 15/2 h, then B can do it in

A and B together can complete a work in 3 days. They start together but, after 2 days, B left the work. If the work is completed after 2 more days, B alone could do the work in

A and B together can complete a piece of work in 12 days, B and C can do it in 20 days and C and A can do it in 15 days. A, B and C together can complete it in