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Wipro NLTH Written Test Qs.(Quantitative Aptitude) :: Chain Rule - Discussion

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3 machines a,b,c can be used to produce a product. Machine a will take 60 hours to produce a million units. Machine b is twice as fast as machine a. Machine c takes the same amount of time as machine a and b taken together. How much time will be required to produce a million units if all the three machines are used simultaneously?

A12 hours

B10 hours

C8 hours

D5 hours

ENone of above

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Asked In :: Wipro NLTH SSC CGL Tier I

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