**Concept: The question tests on the basics of** **Ratios and Fractions**

**Solution:**

Since the time of the day is the same, the triangles formed will be similar.

Let the height of the minaret = x

Then 36/24=(x+3)/50

3/2=x+3/50

150 = 2x + 6

2x = 144

x = 72**Option B**