If I have multiple website in 1 hosting then waht result come out from SEO perspective ? please gives your details opinion
No worries... all shared host have the same ip unless otherwise requested(and I have had sites on shared that performed well), and on a shared host if you have a malicious site, it can effect you, but in your case, it should make little difference.
It is ideal to have separate c-class IP's for each site. If you have sites on their way to success I would recommend buying them a dedicated IP address.
You can rank if your in a shared hosting. If you make link network within your site you want't get any additional advantage
It will be a better practice if you can manage hosting multiple sites on each dedicated IP. Single hosting won't matter.
Having multiple websites allows you to broaden your horizons into multiple related niches. In addition, having several websites also gives you the power of creating a “link farm.†Link farms are networks of websites that all link to each other, with on main website as the main focus. The more links to your site there are posted on the web, the higher your search engine ranking will be. This is just one of the advantages of having multiple domains.
I think this will be not effective for SEO prospective. Because Google Spider crawl you all website through Single IP Address. Some times Google neglect these types of factors.