Question

robert is cooking a pork loin roast and a rice dish for dinner. he wants both dishes to be ready at 6:30 p.m. the cookbook says to roast the meat for 20 minutes per pound. the rice dish will take 35 minutes to cook.

q. the pork loin weighs 3.5 pounds. at what time should robert put the roast in the oven?
a. 5:10 p.m.
b. 5:20 p.m.
c. 5:25 p.m.
d. 5:40 p.m.

Explanation:

Calculate total roasting time

$$ t = 3.5\text{ pounds} \times 20\text{ minutes/pound} = 70\text{ minutes} $$

Convert minutes to hours and minutes

$$ 70\text{ minutes} = 1\text{ hour and } 10\text{ minutes} $$

Subtract cooking time from target time

$$ 6:30\text{ p.m.} - 1\text{ hour } 10\text{ minutes} = 5:20\text{ p.m.} $$

Answer:

• A. 5:10 p.m.
• B. 5:20 p.m. (Correct answer)
• C. 5:25 p.m.
• D. 5:40 p.m.