Question

John spent 30 minutes developing an estimate for a job. The job itself took 2 hours, 45 minutes to complete. What is the ratio of the time spent on the job estimate to the total time spent (including the time spent calculating the estimate) on this job?

Answer 1

Answer: $\dfrac{2}{13}$

Step-by-step explanation:

Given : Time spent on developing an estimate for a job = 30 minutes

Time taken by job itself to complete = 2 hours 45 minutes

=$2\times60+45=165\text{ minutes}$

Now, the ratio of the time spent on the job estimate to the total time spent (including the time spent calculating the estimate) on this job will be :-

$\dfrac{30}{165+30}=\dfrac{30}{195}=\dfrac{2}{13}$

Hence, the ratio of the time spent on the job estimate to the total time spent (including the time spent calculating the estimate) on this job is $\dfrac{2}{13}$.