REUTERS The National Bank of Ukraine on Tuesday evening strengthened the official hryvnia exchange rate set for April 11 by five kopiykas, bringing the national currency to UAH 25.97 to the dollar. The Central Bank set the following official exchange rates of the hryvnia against leading foreign currencies for April 11: US$100 cost UAH 2,597.5527 (UAH 2,602.6968 as of April 10); EUR 100 cost UAH 3,210.8349 (UAH 3,184.1393 as of April 10); 10 RUB cost UAH 4.1648 (UAH 4.5004 as of April 10). Read alsoHryvnia strengthens to UAH 25.99 to dollar on interbank market As UNIAN reported earlier, on Tuesday, April 10, hryvnia quotations against the dollar on the interbank forex market by the close of trade settled at UAH 25.94 25.97 to the dollar. Hryvnia quotes against the euro settled at UAH 32.07 32.11, while those against the Russian ruble settled at UAH 0.4088 0.4097. According to the National Bank of Ukraine, the weighted average exchange rate of the hryvnia as of 17:00 was UAH 25.9755 to the dollar, with 454 deals concluded by this time worth a total of $354.96 million.