20 dollars is 20 dollars anywhere.
What you can get with them depends on what sort of dollars they are (Australian, Singapore etc.).
The currency used in Venice, and in the rest of Italy, is the Euro. If you want to buy something in Italy, you will have to exchange your 20 whatever-dollars into Euros.
Like 20 dollars or more
The trip to Venice, Italy from Rimini, Italy by ship takes approximately 3 hours, 20 minutes. The distance is 95.33 miles.
45° 26′ 15″ N, 12° 20′ 9″ E45.4375, 12.335833
Ida Rubinstein died on September 20, 1960, in Venice, Italy.
Ennio Marchetto was born on February 20, 1960, in Venice, Italy.
Marco Polo was in China for 20 yrs, but he served Kublai Khan for 17 yrs.!! Marco was born 1254 and died January 8th 1324. He was born in Venice and died there as well. this is true info.
Mara Venier was born on October 20, 1952, in Venice, Veneto, Italy.
20 dollars
Canda, a municipality from Italy, has a population of 958 inhabitants. The Canda municipality is at 80 km distance from Venice and 20 km distance from Rovigo.
30% off of 20 dollars = 70% of 20 dollars = 20*70/100 = 14 dollars.
5.4 million dollars
It is 16,044 kilometers from Venice, Italy to Melbourne, Australia. A flight between the two cities takes, on average, 20 hours and 30 minutes, not including any layovers.