Answers

  • Brainly User
2015-09-17T11:17:45+08:00
1/4.5 + 1/5.5 = 1/x

LCD: (4.5) (5.5) (x)

5.5x  + 4.5x = (4.5)(5.5)

10x = 24.75
 10        10

x = 2.475

If both presses are used, it will take only 2.475 hours or 2.5 hours to finish the same job.
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