If A takes 4/5 days as B takes and working together they require 20/3 days to complete the whole work. What is the efficiency of B?

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Accepted Answer

Efficiency of A + B = 100/(20/3) = 15% No. of days ( A:B ) = 4 : 5 Efficiency ( A:B ) = 5 : 4 ∴ Efficiency of B = (4/9) x 15 = 20/3 = 62/3%

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