Martin has a 3 bulb camping light that holds four batteries?

3
Dec/09
2

The camp light has a switch that will allow the light to operate one, two, or all three bulbs at the same time. The batteries will last 6 hours with only one bulb burning and 3 hours with two bulbs burning. How long will the batteries last if all three bulbs are on? (Round your answer to the nearest tenth.)

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Comments (2) Trackbacks (0)
  1. Dani
    12:59 am on December 3rd, 2009

    1 hour

  2. Eliza J
    1:28 am on December 3rd, 2009

    the batteries last for 2 hours and this is the correct answer
    coz when there was 1 bulb, battery lasts 6 hours ‘
    So if there are 2 bulbs the batteries will last for 1*6 / 2 = 3 hours
    And if there are 3 bulbs the batteries last for 3*2/ 3 = 2 hours

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