Question

A and b can do a work in 30 days.while b and c in 24 days. c and a in 20 days. all for 10 days. b and c leave. more days for a

Answer 1

A+B=30 days
B+C=24 days
c+A=20 days
to find the total work,l.c.m of 30 d,24d,20d