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.
Many of the tourist centers in Vietnam accept American dollars as payment for goods and services. However, if you want to travel through this southeastern Asian nation feeling less like a tourist and more like a local, use the Vietnamese currency, which is the dong.ou can withdraw up to 2,000,000d from Vietnamese ATM machines, which amounts to about $125 at time of publication. The black market is thriving in Vietnam, but exchanging U.S. dollars for dong on the street is more costly than using a bank or ATM.