Question

Jill burns 100 calories per hour while sleep and 300 calories per hour while walking and 200 calories per hour at work. If in a typical day Jill spends 7 hours sleeping, 2 hours walking and 6 hours working, what is her average calories burned for those hours?

166.67 cal/hr
200 cal/hr
133.3 cal/hr
233.67 cal/hr

I got 140 cal/hr... how do I do this problem?

Answer 1

(100*7 + 300*2 + 200*6)/15 = 166.67

It always helps if you show your own work - then it's possible to point out the mistake, if any.