Question

At his regular hourly rate, Don had estimated the labor cost of a repair job as $336 and he was paid that amount. However, the job took 4 hours longer than he had estimated and, consequently, he earned $2 per hour less than his regular hourly rate, What was the time Don had estimated for the job, in hours?

Answer 1

Answer: the time is 24 hours

Explanation:

Say the regular hourly rate was $ and estimated time was  hours, then we would have:

let r = rate of doing the job

And t = time.

rt = 336

Also, ( r- 2)(t - 4) = 336

Using simultaneous equation and quadratic equation lead to t = 24 hours

Find the attached file for solution