Question

Which places are more prone to landslide?

• A. slope above $5^0$
• B. slope above ${10}^0$
• C. slope above ${15}^0$
• D. slope above ${20}^0$

Answer 1

The correct option is D slope above ${20}^0$

Rotational slides are occurring frequently inhomogeneous materials. These are the most common landslide occurring in fill materials. Associated with slopes ranging from about 20 to 40 degrees. These are the most prone to a landslide if another earthquake occurs at 23 degrees or at 25 degrees, which further collapse at 27 degrees.

From the above details show the correct answer is slope above 20 degrees. Thus correct option is D