Question

Lucia is using energy at a rate of 210 kilocalories (kcal) per hour (h) ice skating. At what rate is Lucia using energy in calories per minute ( / min ) ?

Answer 1

3500cal/min

Explanation:

You have 210kcal/h. There are 1000cal in 1kcal, and 60 minutes in 1 hour:

`(210)/(1) (kcal)/(hour) * (1000)/(1) (cal)/(kcal) * (1)/(60) (hour)/(minutes)`

The units kcal cancel and hours cancel, leaving cal per min:

`(210 * 1000)/(60) (cal)/(minute) = 3500 (cal)/(min)`