# Power per year

1. Feb 14, 2007

### Rasine

If the utility company sold 2.12x10^9 W of energy that they produced every second at an industrial rate of 1.8 cents per kW-hr, what would be their yearly income from this source? Give your answer in dollars.

so what i was doing is this...i was converting from W-s to kW-hr

2.12E9 W-s x kW/1000w x 1hr/3600s=588.89 kW-s

then i found how many hrs in a year 1 yer x 365days/1yer x 24hr/1day=8760

then i took the product of the two to find the amout of energy produced hourly per year which i got 5158676.4

then i multipied that by $.018 (1.8 cents) but my answer was wrong please tell me what is not right 2. Feb 14, 2007 ### denverdoc Was your answer like$92856. I think the units are tricky here. The energy production is 2.12x10^9 per second. Notice "per" . Which means every hr it produces 2.12x10^6 kw-hr.

Last edited: Feb 14, 2007
3. Feb 14, 2007

### Rasine

yes that is what i got

4. Feb 14, 2007

### denverdoc

so try omitting the division by 3600, and see if it is correct per the logic in my first post.