In the drawing below, a boy with his shadow is standing beside a monument with its shadow. the drawing is not drawn to scale.
a. 24.5 ftb. 30 ftc. 32 ftd. 35 ft

There exists the same question from other source that has the image of the drawing. Attached to this answer is the image.

To solve this, first we have to assume ratios.

Real Height / Shadow = 56 / 49
Real Height / 28 = 56 / 49
49 * h = 56 * 28
49h = 1568

Then, we have to divide both sides by 9
h = 32

Therefore, the obelisk is 32 ft

C is correct answer to this question.