If a person consumes 5.43 × 10^5 kcal in a day and one barrel of oil can produce 3.70 × 10^6 kcal, what is the equivalent of energy consumed per year by that person in terms of barrels of oil?
Option 1: 0.15 barrels of oil
Option 2: 0.50 barrels of oil
Option 3: 1.25 barrels of oil
Option 4: 15.00 barrels of oil
The answer is (3), that 538 barrels per year are consumed per year by that person in terms of barrels of oil.
Calculation of Energy Consumption Equivalent to Barrels of Oil
1. Conversion from Kilocalories to Calories:
5.43 × 10^5 kcal = 5.43 × 10^5 × 1000 cal = 5.43 × 10^8 cal
2. Finding the Number of Barrels of Oil Equivalent to Daily Energy Consumption:
5.43 × 10^8 cal / 3.70 × 10^6 cal/barrel = 1.49 barrels/day
3. Determining the Number of Barrels of Oil Equivalent to Yearly Energy Consumption:
1.49 barrels/day × 365 days/year = 538 barrels/year
Therefore, the energy consumed per year by the person is equivalent to 538 barrels of oil, making Option (3) the correct answer choice.