alexisineustis alexisineustis

19-01-2021
Mathematics

contestada

For Tom, it takes 11 hours to restock the store. However, Keith takes 12
hours to do this job. If working together, how long would they take?

Respuesta :

basicxki basicxki

19-01-2021

ANSWER: 5 17/23 hrs (5.7391...)

How?
T = 11 hrs
K = 12 hrs
Together = X

1/11x + 1/12x = 1/x

11x/132 + 12x/132 = 132/132

11x x 12x = 23x —> 23x = 132 (divide 132 by 23x)

= 5.73913043 (5 17/23)

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