If you just look at typical cruising speed, the fastest is the Boeing 747-400ER (used only by Qantas), which cruises at Mach 0.855 (495 knots at 35,000 ft). The fastest civilian aircraft currently in operation is the Cessna Citation X, which cruises at Mach 0.92 (525 knots at 35,000 ft). Views Â· View Upvotes.
The Vietnamese currency is the dong (abbreviated to âdâ). US dollars are also widely used, though less so in rural areas. For the last few years the dong has been fairly stable at around 21,000d to the dollar. Where prices on the ground are quoted in dong, we quote them in dong. Likewise, when prices are quoted in dollars, we follow suit. Thereâs no real black market in Vietnam.
However, US Dollars are widely accepted in both Vietnam and Cambodia and could be used on your travel card. However, if you try to complete a purchase or transaction where US dollars are not accepted (such as ATMs in Vietnam), you will incur a currency conversion fee. A travel credit card is another option, however you will also be charged a currency conversion fee if you complete a purchase in a currency that is not supported by the card.