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When the factories work for h hours per day, P cars are produced every 5 days, with the result that 2P cars are produced every 10 days.BTGmoderatorDC wrote:10 factories, working for h hours per day, can produce P units of cars in every 5 days. Each factory produces car 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 h/2 hours per day instead of h hours per day?
A. 0
B. 2
C. 5
D. 10
E. 20
Normally, the factories will take 10 days to produce 2P units of car if they work h hours per day. However, if they only work h/2 hours per day, the number of days will be doubled to 20 to produce 2P units of car. Therefore, they need an additional 10 days.BTGmoderatorDC wrote:10 factories, working for h hours per day, can produce P units of cars in every 5 days. Each factory produces car 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 h/2 hours per day instead of h hours per day?
A. 0
B. 2
C. 5
D. 10
E. 20
OA D
Source: e-GMAT
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