The solution would be like this for this specific problem:
Given:
Focal length of the objective lens (fo) = 60 cm
Focal length of the eyepiece (fe) = 8.0 cm
Find:
angular magnification of the telescope = ?
So, the formula for angular magnification is:
a = f0 / fe
Where fo = objective lens, and fe = eye lens
So, we divide the total length of the objective lens by the total length of the eyepiece:
a = fo / fe
a = 60 cm / 8.0 cm
a = 7.5 cm
Therefore, the angular magnification of the telescope is 7.5 cm.