Question

how many meridians can be drawn on a globe at a interval of 15 degrees

Answer 1

As earth is a sphere its surface area is 360°.

Now if we are going to draw meridians on a globe at a interval of 15 degrees then we have to divide the 360 with 15 to get the number of meridians can be drawn at that interval.

The answer is 360/15 = 24.

Answer 2

is totally of 360 degree
but meridians can be drawn on a globe at interval of 15° so it should be divided with that and to get actual answer
360 degree divided by 15 degree your answer is 24 degree