GRE-Math-Questions-to-Know-by-Test-Day-2nd-Edition_pag11

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2 › McGraw Hill 500 GRE® Math Questions
Satya can do a job in 5 hours, working alone. Jordan can do the same job in 
4 hours, working alone.
 2. Quantity A Quantity B
 The number of hours it should 2 hours 
take Satya and Jordan to do the 
 job working together
 (A) Quantity A is greater.
 (B) Quantity B is greater.
 (C) The two quantities are equal.
 (D) The relationship cannot be determined from the information given. 
a, b, c, and d are positive integers such that a