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22 August, 23:01

Jernai can complete her algebra 1 final project in 4 hours. Recently she was under a tight deadline, so she and daniela worked together to complete the project in 2.4 hours. How many hours would it take daniela to complete the project on her own?

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  1. 23 August, 01:44
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    6 hours

    Step-by-step explanation:

    We have that the speed in this case would be given per project / hour

    Which means, that the speed of Jernai would be:

    1/4 project / hour and also that the speed of the two meetings would be 1 / 2.4 project / hour, we know that this result must give more the sum of daniela's speed, therefore:

    1/4 + 1 / x = 1 / 2.4

    where x is the time in hours that daniela takes:

    1 / x = 1 / 2.4 - 1/4

    1 / x = 0.1666

    x = 1 / 0.1666

    x = 6

    Which means that Daniela takes 6 hours to do her project if she does it alone
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