Mitu can do a piece of work in 12 hours, Titu and Situ together in 2 hours, and Mitu and Situ together in 3 hours. How long will Titu alone take to do it?
Show answer & explanation
Correct answer: B
Explanation
The correct answer is Option 2 i.e. 4 hours.
Given that
Mitu can finish the work in 12 hours
Titu and Situ can finish the work in 2 hours
Mitu and Situ can finish the work in 3 hours
Let the total work be 12 units
Hence, work completed by Mitu in 1 hour = 1 unit
Work completed by Titu and Situ in 1 hour = 6 units
Work completed by Mitu and Situ in 1 hour = 4 units
Hence work completed by Situ in 1 hour alone = 4 - 1 = 3 units
Wook completed by Titu in 1 hour = 6 - 3 = 3 units
Hence total time taken by her to complete 12 units = = 4 hours.