Question

Roland and Sam wash dogs to make extra money Rollin can wash all the dogs in 4 hours Sam can wash all the dogs in 3 hours how long will it take them to wash all the dogs if they work together

Answer 1

Make a chart such as the one I made to organize it, then follow the steps I used.

Answer 2

Answer:

$1\frac{5}{7}\text{ days}$

Step-by-step explanation:

Given,

Rollin can wash all the dogs in 4 hours,

The work done by Rollin in one day = $\frac{1}{4}$

Also, Sam can wash all the dogs in 3 hours,

The work done by Sam in one day = $\frac{1}{3}$

The total work done by both Rollin and Sam in one day = $\frac{1}{4}+\frac{1}{3}=\frac{3+4}{12}=\frac{7}{12}$

Hence, the time taken by them when they work together = $\frac{1}{7/12}=\frac{12}{7}=1\frac{5}{7}\text{ days}$