Question

Two people P and Q can finish a piece of work in
12 days. P alone can finish it in 30 days. In how many
days can Q alone complete the job?​

Answer 1

Answer:

30 and 12 l.c.m is 60

p efficiency 2

p and q efficiency 5

substract 2 from 5

q efficiency 3

work 60

so 60 /3 = 20