A jet plane flies through air with a velocity of 2 Mach. While the velocity of sound is 332 m/s the air speed of the plane is :

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Q: 3 (NDA-I/2011)
A jet plane flies through air with a velocity of 2 Mach. While the velocity of sound is 332 m/s the air speed of the plane is :

question_subject: 

Science

question_exam: 

NDA-I

stats: 

0,14,12,7,2,3,14

keywords: 

{'jet plane': [0, 0, 0, 1], 'air speed': [0, 0, 0, 1], 'velocity': [0, 2, 2, 6], 'plane': [0, 0, 4, 8], 'sound': [4, 3, 10, 15], 'mach': [0, 0, 0, 1], 'air': [1, 0, 0, 0]}

The velocity of a jet plane is given as 2 Mach. Mach is a unit of measure that represents the ratio of the speed of an object to the speed of sound in the surrounding medium. In this case, the velocity of sound is given as 332 m/s.

Option 1: 166 m/s

This option is incorrect. A velocity of 166 m/s is less than the speed of sound, and therefore cannot be the air speed of the plane.

Option 2: 66.4 km/s

This option is also incorrect. 66.4 km/s is a much higher speed than the speed of sound and does not align with the given information.

Option 3: 332 m/s

This option is incorrect. While the velocity of sound is indeed 332 m/s, the question specifically states that the jet plane`s velocity is 2 Mach, not equal to the speed of sound.

Option 4: 664 m/s

This option is correct. Since the velocity of sound is given as 332 m/s, and the jet plane`s velocity is 2 Mach, the air speed of the plane would be double the speed of sound, which is 664 m/s.

In summary, the correct answer is option 4,