Correct option is C
Given:
A, B, and C finish the work in 15 days working alternately.
The efficiency of A is the same as that of B.
The efficiency of C is equal to that of A.
The order in which they work alternately is C, A, and B.
Concept Used:
work efficiency of doing work is inversely proportional to the time taken to complete the work.
Solution:
Efficiency: A = B = C
A,B, C working alternately finish in 15 days
∵ efficiency of all 3 is same
=> Order will not effect
=> Required time = 15 days.
A,B, C working alternately finish in 15 days
∵ efficiency of all 3 is same
=> Order will not effect
=> Required time = 15 days.
English
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