What is both possible and impossible at the same time?

I am dry when I go inside, but wet when I am pulled outside.
The longer I am inside, the stronger I get
When I am completely out, I am wet and I literally sag
Who am I?

An express train takes 3 seconds to enter the tunnel which is 1 km long.
If it is travelling at 120 km an hour, how long will it take to pass completely through the tunnel?

Complete the following series. It.s very logical:

1, 4, 5, 6, 7, 9, 11, __?

Name the three-letter word that can complete the below words?

A) L O _ _ _ E
B) E D U _ _ _ E
C) _ _ _ E R
D) _ _ _ T L E

A man is lying dead in a field where no one is around. His head is split open and his legs are disfigured. Near to him, there is an unopened package. No living organism can be found anywhere at the crime scene.

How did he die?

Two batsman each on 94 runs. Seven runs needed to win in last 3 balls. Both make 100*. How?

As easy as you can get into me, it is as hard to get out of me.

Do you know what I am?

What does this rebus mean?

O
N
C
E
TIME

Who has married many women but was never married?