. Alex plays rugby and can burn approximately 650 calories in a 1.25-hour game. Danielle enjoys
kickboxing and can burn approximately 420 calories in a 45-minute class. Who burns calories at
a higher rate?
divide calories by time
make sure time units are consistent
Alex: 650cal./1.25hr = cal./hr.
Danielle: 420cal./0.75hr. = cal./hr.
To determine who burns calories at a higher rate, we need to compare the calories burned per unit of time for both Alex and Danielle.
Alex burns approximately 650 calories in a 1.25-hour game.
To find the rate at which Alex burns calories, we can divide the calories burned by the duration of the game:
Rate for Alex = 650 calories / 1.25 hours = 520 calories/hour.
Danielle burns approximately 420 calories in a 45-minute class.
To find the rate at which Danielle burns calories, we can divide the calories burned by the duration of the class:
Rate for Danielle = 420 calories / 0.75 hours = 560 calories/hour.
Comparing the rates, we find that Danielle burns calories at a higher rate than Alex.
To determine who burns calories at a higher rate, we need to compare the calories burned per unit of time for Alex and Danielle.
First, let's find the calories burned per hour for each activity:
For Alex playing rugby:
Calories burned per hour = (Calories burned in 1.25 hours) / 1.25
Calories burned per hour = 650 / 1.25
Calories burned per hour = 520
For Danielle kickboxing:
Calories burned per hour = (Calories burned in 45 minutes) / (45/60)
Calories burned per hour = 420 / (45/60)
Calories burned per hour = 420 / 0.75
Calories burned per hour = 560
Now we can compare the calories burned per hour for both activities:
Since 560 calories per hour is greater than 520 calories per hour, Danielle burns calories at a higher rate than Alex.