Question

An 11 1/2 pound cut of roast beef is to be medium roasted at 350 Fahrenheit. Total roasting time is determined by allowing 13 minutes roasting time for every pound of beef . If the roast is placed in a preheated oven 2:15 pm ., what time should it be removed

Answer 1

If we must do 13 minutes of roasting time for every pound of beef, and we have 11.5 pounds of roast beef, the total roasting time will be the multiplication:

$\begin{gathered} t=13\times11\frac{1}{2} \\ \\ t=149.5\text{ minutes} \end{gathered}$

Then it should stay 149.5 minutes in the oven. But it's not a practical result, then, let's convert in hours and minutes:

Then 149.5 minutes is equivalent to 2 hours, 29 minutes, and 30 seconds. We can do an approximation and say that the roasting time is 2 hours and 30 minutes.