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\(10\) factories, working for \(h\) hours per day, can produce \(P\) units of cars every \(5\) days. Each factory produces cars at the same constant rate. What is the additional time taken by the \(10\) factories to produce \(2P\) units of cars, if they work for \(\dfrac{h}2\) hours per day instead of \(h\) hours per day?
A. 0
B. 2
C. 5
D. 10
E. 20
Answer: D
Source: e-GMAT
A. 0
B. 2
C. 5
D. 10
E. 20
Answer: D
Source: e-GMAT
