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10 January, 17:06

David worked 7 1/3 hours today and planted 11 trees. It takes him about the same amount of time to plant each tree. How long did it take him to plant each tree?

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  1. 10 January, 17:19
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    2/3 hours or 40 mins.

    Step-by-step explanation:

    No. of trees planted by David = 11

    No. of hours worked by David to plant 11 trees = 7 1/3 hours = (7*3 + 1) / 3 = 22/3

    It takes him about the same amount of time to plant each tree

    let time taken to plan 1 tree be x

    then time taken to plan 1*11 tree = 11*x

    But, given that total time taken is 22/3 hours

    thus,

    11x = 22/3 hours

    x = 22 / (3 * 11) = 2/3

    Thus, it took 2/3 hours to plant each tree.

    As 1 hour has 60 minutes

    Time taken in minutes to plant 1 tree = 2/3 * 60 mins = 40 mins
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