In: Finance
Beatles will double in value from £35,000 to £70,000 in 9 years. If the “rule of 72” applies, what is the approximate implied annual interest rate if the dealer’s claim is true? What is the actual annual interest rate if the claim is true?
Approximate Implied Annual Interest rate = 72/ no. of years taken to double the value
=72/9
= 8%
Actual Interest rate comes to 9.02% as per below calculation.
Invested Amount | Interest amount @ 9.02% | Total (Principal + Interest) | |
1 | 100 | 9 | 109 |
2 | 109 | 10 | 119 |
3 | 119 | 11 | 130 |
4 | 130 | 12 | 141 |
5 | 141 | 13 | 154 |
6 | 154 | 14 | 168 |
7 | 168 | 15 | 183 |
8 | 183 | 17 | 200 |