1. The translation efficiency of an electronic receiver is 75 times of that of human. How many times of that of an electronic receiver? 2. For a project, if Party A works alone, it will be completed as scheduled, while if Party B works alone, it will be delayed for 3 days. Now, Party A and Party B cooperate for 2 days, and the rest will be done alone by Party B, which will be completed as scheduled?

1. If the speed of manual efficiency is V, the efficiency of electronic receiver is 75 v
(20000 / V) / (30000 / 75V) = 50 times;
2. Set the total project as 1 and the specified time as X
Then 1 = 2 / x + 2 / (x + 3) + (X-2) / (x + 3)
We get x = 6

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