the concorde is the fastest airline used for commercial service.it can cruise 1450 mile per hour (about two time speed of sound ) what is in m/ sec
(1)644.4m/sec
(2)80 m/sec
(3)40m/sec
(4)none
a)644.4m/sec might be the ans. as The Hint given in the bracket tell us that it is 2times the speed of sound means it becomes nearby 340×2=680 and remaining may be the resistance opposing it..
wht is the ans Dear Frnd.?