Question

Running at 9mph expends, .103 kcalories per pound per minute. About how many kcalories will a 120-pound expend during a 30-minute run?

a. 13
b. 370
c. 903
d. 730
e. 309

Answer 1

A 120-pound individual running at 9mph, expending 0.103 kcal per pound per minute, will burn approximately 370 kilocalories during a 30-minute run.

Step-by-step explanation:

To calculate the number of kilocalories a 120-pound individual will expend during a 30-minute run at 9 mph, we can use the given rate of energy expenditure of .103 kcal per pound per minute. The formula to determine the total kcal burned is as follows:

• Calories burned per minute = energy expenditure rate (kcal/lb/min) × bodyweight (lb)
• Calories burned in total = calories burned per minute × total time (min)

Let's apply this formula:

1. Calories burned per minute = 0.103 kcal/lb/min × 120 lb = 12.36 kcal/min
2. Calories burned in total = 12.36 kcal/min × 30 min = 370.8 kcal

Therefore, a 120-pound individual will burn approximately 370 kcal during a 30-minute run at 9 mph. So, the correct answer is b. 370 kcal.