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9 April, 03:21

It takes for three gardeners 90 minutes to weed a garden. If the job is to be done in only 15 minutes, how many more gardeners need to be put on the jobs?

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Answers (2)
  1. 9 April, 03:38
    0
    The answer is 15 gardeners.

    Thus, 15 gardeners would be needed if the job is to be done in only 15 minutes.
  2. 9 April, 03:46
    0
    3 gardeners : 90 minutes

    ? Gardeners : 15 minutes

    1 gardener : 270 minutes

    ? Gardeners : 270/15

    18 gardeners
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