GMAT Problem Solving

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Source: OG13th

Level: 5

At his regular hourly rate, Don had estimated the labor cost of a repair job as $336 and he was paid that amount. However, the job took 4 hours longer than he had estimated and, consequently, he earned $2 per hour less than his regular hourly rate. What was the time Don had estimated for the job, in hours?

  • A 28
  • B 24
  • C 16
  • D 14
  • E 12

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