Akash is thrice as good a workman as Baldev and therefore is able to finish a job in 40 days less than Baldev. Working together, they can do it in

Explanation

Ratio of times taken by Akash and Baldev = 1 : 3 The time difference is (3 - 1) 2 days while Baldev take 3 days and Akash takes 1 day. If difference of time is 2 days, Baldev takes 3 days. 3 If difference of time is 40 days, Baldev takes = 2 × 40 = 60 days So, Akash takes 20 days 1 Akash's 1 day's work = 20 1 Baldev's 1 day's work = 60 1 1 4 1 (Akash + Baldev)'s 1 day's work together = 20 + 60 = 60 = 15 ∴ Akash and Baldev together can do the work in = 15 days