Question

If P and Q together can complete a job in 3 days while P/
alone can do the same in 12 days, then how many days
would be required by Q to do the job alone?
A) 3 days
B) 4 days
C) 6 days
D) 12 days​

Answer 1

Answer:

B takes 4days to do the job alone

Step-by-step explanation:

let work be constant LCM (3,12)=12units

p+q do 12/3 = 4u/day

p does 12/12 = 1u/day

from above two eq

q does the remaining 3u/day

to do 12u b takes 4 days