Respuesta :
Using the together rate, it is found that they will take 2.4 hours working together.
What is the together rate?
It is given by the sum of each separate rate.
In this problem, the together rate is of 1/x, while Brian and Greg's rates are of 1/6 and 1/4, respectively, then:
[tex]\frac{1}{x} = \frac{1}{6} + \frac{1}{4}[/tex]
[tex]\frac{1}{x} = \frac{4 + 6}{24}[/tex]
[tex]10x = 24[/tex]
[tex]x = 2.4[/tex]
They will take 2.4 hours working together.
More can be learned about the together rate at https://brainly.com/question/25159431
