In this question, we are given a class with 60 students. We are also given that the number of girls is twice that of boys. Let`s first calculate the number of girls and boys in this class.

Let`s assume the number of boys is x. So, the number of girls will be 2x (twice that of boys).

Total students in the class = number of boys + number of girls

60 = x + 2x

60 = 3x

x = 20

So, there are 20 boys and 40 girls in the class.

Next, we are told that Kamal ranks seventeenth from the top and there are 9 girls ahead of him. This means that there are 16 students ahead of Kamal, including those 9 girls.

Now, let`s find the number of boys after Kamal. Total students after Kamal = Total students in the class - Kamal`s rank

Total students after Kamal = 60 - 17 = 43

Since there are 9 girls ahead of Kamal, the remaining students after Kamal are boys.

Number of boys after Kamal = Total students after Kamal - Number of girls ahead of Kamal

Number of boys after Kamal =