Roast Cooked @ 325 F.

[kanha81]

A roast was cooked at 325° F in the oven for 4 hours. The internal temperature rose from 32° F to 145° F. What was the average rise in temperature per hour?

A. 20.2° F/hr
B. 28.25° F/hr
C. 32.03° F/hr
D. 37° F/hr
E. 37.29° F/hr

How do I solve these type of problem? What is a good approach.

[scoobydooby]

the temperature rose from 32° F to 145° F
=> rise in temperature: 145-32=113°

average rise per hour: 113°/4=28.25°
hence B.

(we dont need the 325° to do our calculation, it must have been the temperature of the heating element/coil)