A, B and C can complete a piece of work in 4, 28 and 56 days respectively. Working together, they can complete the same work in how many days?
Show answer & explanation
Correct answer: D
Explanation
Correct Answer is option 4 i.e. 56/17
|
Understanding |
Application |
|
A, B and C can complete the work in 4, 28 and 56 days respectively. Total work = 56 units [LCM of 4, 28 and 56] Efficiency of A = 56/4 = 14 Efficiency of B = 56/28 = 2 Efficiency of C = 56/56 = 1
|
Time in which they will complete the work together = 56/(14 + 2 + 1) = 56/17 days |