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Is it same between laser jet printer and laser printer?

The office jet printer can copy Janet's dissertation in 18 min. The Laser Jet printer can copy the same docume?

  • The Office Jet printer can copy Janet's dissertation in 18 min. The Laser Jet printer can copy the same documents in 14 min. If the two machines work together, how long would they take to copy the dissertation?

  • Answer:

    This is called a simultaneous equation. To solve that you multiply the two times (18 * 14 = 252) and then divide that answer by the two times added together (18 + 14 = 32), so you have 252/32 = 7.875 minutes combined time when they are working together. Now you can round to the nearest tenth = 7.9 minutes or 7 minutes & 54 seconds (1/10 of a minute equals 6 seconds, multiplied by .9 = 54 seconds), or round to the nearest minute = 8 minutes, depending on what your teacher likes. Remember that equation for the test. That equation is also used in electronics to derive the resistance value in a divided parallel resistor circuit. Best of luck.

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