M and R together can do a work in 18 days. R and P together can do the same work in 24 days. P and M together can do the same work in 36 days. Working together, how much part of work can they do in 4 days?
Show answer & explanation
Correct answer: A
Explanation
Combined work capacity of the three -
2(M+R+P) = 1/18 + 1/24 + 1/36
= 1/8
M+R+P = 1/16
Work done in 4 days = 4 × 1/16 = 1/4