Answer and Explanation:
The computation is shown below:
a. Real interest rate is
= Nominal interest rate - inflation rate
= 1% - 3%
= -2%
2. The number of years is
We have to use the rule of 70 for doubling the investment
= 70 ÷ annual interest rate
= 70 ÷ 1.75%
= 40 years
We simply applied the above formula so that the correct value could come
And, the same is to be considered