Answer:
6.7 years
Step-by-step explanation:
This question can be answered using Rule 70. It is a rule that it used to estimate how long it takes for an investment to double in value. In this case, the investment is land and the rate is 10.5%.
Formula for rule 70;
Time it takes for value to double = 70/rate
Time it takes for value to double = 70/10.5
Time = 6.6666
To the nearest 1 decimal place, it would take 6.7 years