The speed of hyper-sonic missile is ______ times the speed of sound which is launched by US Navy?

Question

Accepted Answer

5 times. D is correct because many early hypersonic missiles are designed to travel at speeds around 5 times the speed of sound. A is incorrect as this specific factor is not generally cited for US Navy launches. B is incorrect as there is no standard reference supporting a 15 times multiple. C is incorrect as this value does not match common specifications for such missiles.