Answer:
Long and think, red within, with a nail at the end.
A hill full, a hole fullอพ yet you cannot catch a bowl full. What is it?
When young, I am sweet in the sun. When middle-aged, I make you gay. When old, I am valued more than ever.
You can see nothing else, When you look in my face, I will look you in the eye, And I will never lie.
In the evening I'm long, in the morning I'm smallอพ When seen in a ballroom, I'm nothing at all.
Something wholly unreal, yet seems real to I. Think my friend, tell me where does it lie?