Solution:

Teapot B contains 20 cups of tea as its outlet is placed in the middle of teapot A. Rest of the
tea just starts overflowing.

Solution:

The Letter L

Solution:

The man is dead and not mute.

Solution:

No shadows.

Solution:

Girl 3

Our feet usually and unconsciously point toward the one with who we are most interested.

Solution:

The blazer from man3 is on the boss's chair. So he is the boss.

Solution:

The girl in the red shirt.
As she is eating a sandwich that looks like it's years old, and that might kill her.

Solution:

11

10 people have pair of eyes, so 20 eyes.
So we have 10 people in addition to the man who dropped the book. She cannot look at herself, but she is still in the Church.

Solution:

Frank was born in room #1933

Solution:

The bus doesn't have side mirrors and windshield wipers.