If you had a pizza with crust thickness 'a' and radius 'z', what's the volume of the pizza?

What is harder to catch the faster you run?

Why do people go to bed?

What can jump higher than a building?

Can you name four days which start with the letter 'T'?

A cat had three kittens: Snophy, Topsy and Jorden. What was the mother's name?

When we see 2 but call 10?

The barber of Town shaves all men living in the town. No man living in the town is allowed to shave himself. The barber lives in that town. Who then shaves the barber of the town?

In the following picture, E is going to slide the object down and as per the terrain and the physics, the round object is going to travel all the way till the end. Now, can you analyze who all people will die when it happens?

It's a protector.
It sits on a bridge.
One individual can see directly through it, while others wonder what it hides.

What is it?