what does this picture(rebus) riddle means ?

What's the only room from which no one can enter or leave

You board a train. The train will have to enter a tunnel soon. You are claustrophobic. Which place is the best for you to sit?

John is selling fruits.
He sells grapes at $30, Dates $25, and a Wolfberry $45.
At what price does he sell fig?

PS: Logical Thinking

Decode below three cipher riddles:

26 L of the A
7 D of the W
1000 Y in a M

It comprises roots which nobody sees,
Much taller than those trees,
Up and up it goes,
Still it never grows?

In the addition below, all digits have been replaced by letters. Equal letters represent equal digits and different letters represent different digits.
ABCABA
BBDCAA
ABEABB
ABDBAA
------- +
AAFGBDH
What does the complete addition look like in digits?

Known by all without exception, Forever here, for your protection, Sometimes strong, sometimes weak, Right after the night I come - hot and chic. And while millions of miles away, I always get to you, I find my way. No life around could do without me, Can you guess what I might be?

After undergoing a successful eye operation, A blind girl has just boarded a train to her home. The doctor asked her to open the bandages after 3 hours. On her train journey, she opened the bandages and within a fraction of the time she commits suicide by jumping off the train.

Though her operation was successful, Why did she commit suicide?

Count the number of triangles in the given picture.