Question : A is 40% more efficient than B. How much time will they take to work together to complete a job which A alone could have done in 31 days?
Option 1:
Option 2:
Option 3:
Option 4:
Correct Answer:
Solution :
Given: A is 40% more efficient than B.
The time taken by A to complete the task alone is 31 days.
Work = Time × Efficiency.
Let B's efficiency be 100.
Then,
⇒
The total work is done by A in 31 days.
Let the total work = 31 × 7 = 217 units
So, the time taken with A and B working together
Hence, the correct answer is
SSC CGL Complete Guide
Candidates can download this ebook to know all about SSC CGL.