P and Q can complete a work in 12 days, Q and R in 15 days, R and P in 20 days. In how many days can they work together?
A. 10
B. 12
C. 5
D. 14
1
B
2
C
3
D
4
A
P and Q can complete a work in 12 days, Q and R in 15 days, R and P in 20 days. In how many days can they work together?
A. 10
B. 12
C. 5
D. 14