In regard to your question, you haven't inadvertently muted your iPad by the little slide switch on the top right hand side have you? Also have a look here, do the four finger swipe up or double tap the home button to bring up your multi task bar at the bottom of your page. Finger swipe to the right as far as you can go and you will see a volume slide here. Let us know if this doesn't fix the problem and we'll give you a few more steps to try.
The IPad Forum is a community of members from all walks of life and from all over the world coming together to share our experiences and to help each other learn about this wonderful piece of technology the Ipad. There is a wealth of information already here in the many threads we have so doing some searches will answer most of the questions you have. If then you cannot find the answer you are seeking then by all means post your question. There are many friendly and informed members here only too willing to help you.