Question

Each minute of dancing burns 0.02 calories per pound. There are 417 calories in a Quater Pounder sandwich from McDonald's. Liz weighs 120 pounds. How many minutes would it take Liz to complete burn off the sandwich while dancing?

Answer 1

We know that

• The rate is 0.02 calories per pound each minute.

,

• There are 417 calories.

,

• Liz weighs 120 pounds.

First, we multiply the weight with the rate.

`120lb\cdot0.02\frac{\text{cal}}{lb}=2.4cal`

This means Liz burns 2.4 calories each minute. If there are 417 calories, we just have to divide.

`(417)/(2.4)=173.75\min`

Therefore, Liz would take 173.75 minutes to burn off the sandwich.