Question
"P" is able to finish a job in 20
days. "K" can complete the same job in 4 days less than "P." If they work together, how many days will it take for them to jointly complete 90% of the job?Solution
ATQ,
Time taken by 'K' to complete the work = 20 – 4 = 16 days Let the total work = 80 units Eiciency of 'A' = 80/20 = 4 units/day Eiciency of 'K' = 80/16 = 5 units/day Required time taken = 0.90 × 80/(4 + 5) = 8 days
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