The greatest speed recorded by a manned airbreathing jet aircraft is 2,194 miles per hour. What is the speed in kilometers per hour?

a.1.6

b.1,371

c.3,530

d.13,383

Question

The greatest speed recorded by a manned airbreathing jet aircraft is 2,194 miles per hour. What is the speed in kilometers per hour? 

 a.1.6 

 b.1,371 

 c.3,530 

 d.13,383

anonymous · Answer

Do you remember how many kilometers there are in a mile?  If so, it is a simple unit conversion where you just multiply the speed (2,194 mi/hr) by the number of kilometers per mile (~1.6 km/1 mi).  This would give you the result of about 3,530 km/hr.