What does the below rebus riddle means?

Luis Garavito killed Density x Volume.

Who is Luis Garavito ?

A man is found hanging dead from the ceiling of a room. The room’s dimensions are 15 x 15 x 15. The man is only 6ft tall and the rope was only 2ft long. There are no windows and only one door to the room. The door is bolted shut from the inside, and a puddle of water is under the man. How did he kill himself?

Can you solve the tricky chess rebus puzzle below by ciphering the hidden meaning?

Which is heavier: a ton of bricks or a ton of feathers?

How can you make a TV, a bed, a dog, and a car liquid?

Replace each alphabet with the number (1-9) to make the below equation correct.

AB * C = DE - F = GH / I

As a whole I am both
safe and secure.

Behead me and I become
a place of meeting.

Behead me again and I am
the partner of ready.

Restore me, and I become
the domain of beasts.

What am I?

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

Do you know what I am?

What has six faces, but does not wear makeup, has twenty-one eyes, but cannot see?