Get currency rates for a multiple currencies in magento

you can get currency rate by using below code :

Mage::getModel(directory/currency);

I have try for get currency rates for a multiple currencies in magento a site.
First: get allowed currency for a store

get base currency for a store

Then fetch currency code rate and complete code is

Displaying different currencies for a single product If get different currencies for a product and want of product price difference rate then just multiply rate

Magento currency rates is managed from admin, so to admin > system >Manage Currency >Rates and managed currency symbol from admin > system >Manage Currency >Symbols If want to add multiple currency then goto admin > system > GENERAL > Currency setup> Allowed Currencies