Question

Energy use in Kunesia is projected to increase at the rate of 3% per year for the next few decades. How many years will it take Kunesia to double its current usage? Option 1) 12 years Option 2) 20 years Option 3) 24 years Option 4) 33 years

Answer 1

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Step-by-step explanation:

To determine how many years it will take for Kunesia to double its current energy usage, we need to consider the annual growth rate of 3%.

When a quantity grows at a constant rate, we can use the rule of 70 to estimate the doubling time. The rule of 70 states that to find the doubling time, divide 70 by the growth rate.

In this case, the growth rate is 3%, so we divide 70 by 3 to find the doubling time:

70 / 3 ≈ 23.33 years

Therefore, it will take Kunesia approximately 23.33 years to double its current energy usage.

Looking at the given options:

- Option 1) 12 years: This is less than the estimated doubling time, so it is not correct.

- Option 2) 20 years: This is also less than the estimated doubling time, so it is not correct.

- Option 3) 24 years: This is close to the estimated doubling time, so it could be a possible answer.

- Option 4) 33 years: This is more than the estimated doubling time, so it is not correct.

Based on the estimated doubling time of 23.33 years, Option 3) 24 years seems to be the closest answer.