If you submitted all the business details correctly then your business listing will be approved in a short time. If you tried to spam like adding lots of links in description and not submitted all required business details than it might be not approved.
If you submitted a free business listing than it may take 1days to 2weeks to approve your business listing because all the business listing is manually verified and also depends on numbers of submission of free business listings in a queue.
Make Sure you submitted all the details properly.
Gallery Image:- 350px*450px – (minimum 5 images)