Question

A can do a piece of work in 10 days, B can do it in 12 days and C can do it in 15 days. In how many days will A, B and C finish it, working all together?

A) 6 days B) 5 1/4 days C) 4 4/11 days D) 4 days

Answer 1

A can do a piece of work in 10days

B can do a piece of work in 12days

C can do a piece of work in 15days

number of day of A + number of days of B + number of days of C/3

10+12+15/3

=37/3

together can do a piece of work in 37/3