If Sita and Gita can do a job together in 4 days and Sita alone can do the job in 6 days, in how many days can Gita do the job alone?
Show answer & explanation
Correct answer: C
Explanation
The correct answer is option 3 i.e. 12.
Sita and Gita can do a job together in 4 days and Sita alone can do the job in 6 days
LCM(4, and 6) = 12
The efficiency of Sita and Gita = 12/4 = 3 units
The efficiency of Sita = 12/6 = 2 units
The efficiency of Gita = 3 - 2 = 1 unit
Thus,
Time taken by Gita = 12/1 = 12 days