P and Q can do a work individually in 15 days and 20 days respectively. Find the respective ratio of their efficiencies.A4 : 3B3 : 4C4 : 5D5 : 4Answer: A. 4 : 3 Read Explanation: Time ratio of P and Q = 15 : 20 = 3 : 4 As we know, Efficiency is inversely proportional to time. ∴ Efficiency ratio of P and Q = 4 : 3Read more in App