Q212
P and Q together can do a job in 6 days. Q and R can finish the same job in 607 days. P started the work and worked for 3 days. Q and R continued for 6 days to finish the work. Then the difference of days in which R and P can complete the alone is P can complete the job alone is ?
P and Q together can do a job in 6 days. Q and R can finish the same job in days. P started the work and worked for 3 days. Q and R continued for 6 days to finish the work. Then the difference of days in which R and P can complete the alone is P can complete the job alone is ?
A.
10 days
AnswerB.
8 days
C.
12 days
D.
15 days
Answer: Option A
Solution
Answer: Option A
Solution:
L.C.M. of Total Work = 60One day work of P + Q = = 10 unit/day efficiency
One day work of Q + R = = 7 unit/day efficiency
Then in 3 days = total work = 18