Questions & Answers about El desnivel es tan grande como el de la cuesta.
Because desnivel is a masculine singular noun, so it takes the masculine singular definite article el.
- el desnivel = the difference in level / the slope / the incline
- The article is used here because the sentence is talking about a specific incline or level difference, not just any one in general.
Tan ... como is the structure used to say as ... as with adjectives or adverbs.
Here:
- tan grande como = as big/large as
So the pattern is:
- tan + adjective + como
Examples:
- Es tan alto como su hermano. = He is as tall as his brother.
- Es tan difícil como parece. = It is as difficult as it seems.
In your sentence:
- El desnivel es tan grande como... = The incline/elevation difference is as great as...