If a runner burns 30 calories in 5 hours and 120 calories in 20 hours, how many calories is he burning per minute?

Question

anonymous · Answer

How many minutes are there in 5 hours?

anonymous · Answer

300

a_clan · Answer

30 cal in 5 hrs = 6 cal in 1 hr(60 min) = 6/60 cal in 1 min

anonymous · Answer

So that's 30 calories in 300 minutes. 
Or 30/300=0.1 calories per minute

anonymous · Answer

I could swear I put in both 1 calorie and 0.1 calorie and it said it was wrong.

katrinakaif · Answer

Well first we need to figure how many mins we have in 5 hours. We know that in:
1hr = 60mins.
So to figure out how many we have in 5 mins, we use 60(5) = 300 as you said.
Next set up a proportion:
300/30 = 60/x
300 = number of mins in 5 hours burns '30' calories
and 60 mins = 1 hr burns x calories

Cross Mulitply and get:
300x = 1800

Divide by 300 onhn both sides giving..? 6 calories per min :)

jhonyy9 · Answer

6*5=30
6*20=120 
- from this resulted that he burning 6 calories per minute

rosey · Answer

runners r hot <3