Answer:
45 years old
Explanation:
If Tom's father was 30 when Tom was born, he must be 30 years older than Tom. Therefore, if Tom is now 30, his father must be 60 years old (30+30)
Now, to find the average age of the two, we can add 30 and 60 together and divide by two.
= (30 + 60)/ 2
= 90/2
= 45 years old