A company has started production of a new product and has found that the first 10 units of production took 120 hours. The next 30 units produced took a further 150 hours. What was the learning rate? A. 75.00% B. 56.25% C. 66.70% D. 80.00%
The answer is 75% but I dont get it? I try using table approach and still dont get it