Ajeet works 4 times as fast as Sohan. If Sohan can complete a work in 20 days independently, the number of days in which Ajeet and Sohan can together finish the work is:
Show answer & explanation
Correct answer: C
Explanation
The correct answer is option 3 i.e. 4.
Given that
Ajeet works 4 times as fast as Sohan
Hence, let the work done by Ajeet in 1 day be 4 units and by Sohan be 1 unit
Sohan completes the job independently in = 20 days
Hence total work = 20 × 1 =20 units
Hence, the total time taken by both of them working together = = 4 days