Suppose age after 15 years is F.
Present age is 16 years.
Now if we want to find the age after 15 years , we will have to use following formula:
Age after 15 years = Present age +15
We already know present age is 16 years, so plugging this in above formula,
we have
Age after 15 years = 16 + 15
So the final equation becomes:
F=15+16
Answer: Option D. F=15+16
