So, for platskart, the price is same during whole year?
Not quite, tariffs for 'kupe' and 'sv' are regulated by RZD itself, while tariff for 'platskart' is kind of 'social', thus RZD can't just change it on their own. So it's not yet known how 'platskart' tariff will change in 2010.
Will the prices remain same as in 2010?
Tariffs for 'Kupe' and 'SV' in 2011 is raised 5% comparing to 2010 prices. With 'platskart' it is the same story - not yet known.