Lúcia is using energy at a rate of 420 kilocalories (kcal) per hour (h) ice skating.

Question

At what rate is Lúcia using energy in calories per minute cal/min?

Answer 1

1 kilocalorie (kcal) = 1000 calories

So, Lúcia is using energy at a rate of 420 kcal/h x 1000 cal/kcal = 420,000 cal/h

To find the rate in calories per minute, we need to convert hours to minutes.

1 hour = 60 minutes

So, Lúcia is using energy at a rate of 420,000 cal/h / 60 min/h = 7,000 cal/min

Therefore, Lúcia is using energy at a rate of 7,000 cal/min while ice skating.