How to ask about this?

Hello :)

I'd like to know whether the following expressions of asking about class make sense.

The situation is this: Some schools have five classes in a day. Others have six classes in a day. The number of classes depends on school. One class hour is usually 50 minutes.

Question1:
When I ask about the number of classes Can I use the word" hour" instead of "class"?

Question2:
If so, would you tell me if #1～4 are correct or not?

#1 How many hours a day are there in your school?
#2 How many hours in a day are there in your school?
#3 How many hours are there in a day in your school?
#4 How many hours are there in your school in a day?

Especially, do "hours a day" in #1 sound strange in this question?

I look forward to some comment.

Thank you,
Lina

[RonBee]

Originally Posted by Lina

Hello :)

I'd like to know whether the following expressions of asking about class make sense.

The situation is this: Some schools have five classes in a day. Others have six classes in a day. The number of classes depends on school. One class hour is usually 50 minutes.

Question1:
When I ask about the number of classes Can I use the word" hour" instead of "class"?

I wouldn't think so.

Originally Posted by Lina

Question2:
If so, would you tell me if #1～4 are correct or not?

#1 How many hours a day are there in your school?
#2 How many hours in a day are there in your school?
#3 How many hours are there in a day in your school?
#4 How many hours are there in your school in a day?

They are grammatically correct, but I would not use them. Instead, try: "How many classes do you have per day?"

:)

[henry]

I like RonBee's version.

:)