Chapter 7.4, Problem 14P

To determine

To find: Total dollar does plumber make from job on working per hour.

Answer to Problem 14P

Plumber make $\$3.15$ per hour on working from job.

Explanation of Solution

Given information:

Total price plumber made on working from job is $\$600$ from job.

Apprentice also made $\$600$ from job who worked $\$3$ per hour.

Also apprentice worked $10hour$ more than plumber.

Formula used:

We will use unitary method.

Total hour apprentice worked is $x+10$ hour.

Calculation:

Consider that the plumber worked total $x$ hour.

Apprentice also made $\$600$ from job who worked $\$3$ per hour.

Recall that we will use unitary method.

Therefore for $\$3$ apprentice worked $1hour$.

So for $\$600$ apprentice worked $200hour$.

Recall that apprentice worked is $x+10$ hour.

Since apprentice worked $200hour$ which is equivalent to $x+10$ hour.

Therefore plumber worked total $190$ hour.

Now for $190$ hour plumber made $\$600$.

Recall that we will use unitary method.

Therefore for $1$ hour plumber made $\frac{\$600}{190}=\$3.15$.

Therefore Plumber make $\$3.15$ per hour on working from job.