NEET BIOLOGY

Detailed explanation-1: -Doubling time is the amount of time it takes for a given quantity to double in size or value at a constant growth rate. We can find the doubling time for a population undergoing exponential growth by using the Rule of 70. To do this, we divide 70 by the growth rate (r).

Detailed explanation-2: -Explanation of the Rule of 70 The formula is as follows: Take the number 70 and divide it by the growth rate. The result is the number of years required to double. For example, if your population is growing at 2%, divide 70 by 2. The result is 35; it will take 35 years for your population to double at a 2% growth rate.

Detailed explanation-3: -The number of years it takes for a country’s economy to double in size is equal to 70 divided by the growth rate, in percent. For example, if an economy grows at 1% per year, it will take 70 / 1 = 70 years for the size of that economy to double.

Detailed explanation-4: -2) Rule of 70 Divide 70 by current inflation rate to know how fast the value of your investment will get reduced to half its present value. Inflation rate of 7% will reduce the value of your money to half in 10 years.