Tourist Visa for staying in Hong Kong

I m Flying From Mumbai on Dt. 19.02.2013 to Shanghai from Cathay Pacific Airlines, My Change of Plane at Hong Kong Airport. My Mumbai Flight will start 01.30 AM & Reach 09.20 AM to Hong Kong then my Next Flight to Shanghai is 09.20 PM From Hong Kong, so almost 12 Hour Break at Hong Kong Airport, In this 12 Hours Break can i visit Hong Kong city?
May i Required any Visa?
If Yes, From Where & how i can get it?
Can i ask Lodging/ Boarding & Traveling Facility in Hong Kong to Cathey Pacific Airlines?
Please advice....