A jet plane flies through air with a velocity of 2 Mach. While the velocity of sound is 332 mis, the air speed of the plane is

Options

A. 166 m/s
B. 66.4 km/s
C. 332 m/s
D. 664 m/s

Answer

D

Explanation

`"Mach Number "=("Speed of body in any medium")/("Speed of sound in that medium")`
According to question
`2=("velocity of jet plane")/(332)`
`664 m//s ="velocity of jet plane."`