Final Answer:
Miles is three years old, and his grandparents are likely to be in their late 50s or early 60s.
Step-by-step explanation:
In the first paragraph, we establish that Miles is three years old. To estimate the age of his grandparents, we typically consider that grandparents are generally older individuals who have had children and then those children have had their own children. Therefore, Miles' parents are likely in their late 20s to early 30s, and his grandparents are probably in their late 50s or early 60s. This assumption is based on the average age at which people become parents and grandparents.
The second paragraph further elaborates on the reasoning. If we assume that Miles' parents had him when they were around 30 years old, and that his grandparents had their own children in their early 30s, we can approximate the grandparents' age. Adding 30 years to the parents' age (assuming they became parents at 30) gives us the grandparents' age at the time of Miles' parents' birth. Adding another 30 years to that age accounts for the time it takes for Miles' parents to have Miles. Thus, we estimate that Miles' grandparents are likely in their late 50s or early 60s.
In the final paragraph, we summarize the calculation and reiterate the age range for Miles' grandparents. The explanation uses straightforward logic and basic arithmetic to arrive at a reasonable estimate of the grandparents' age, considering the typical age at which people become parents and grandparents.