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An Indian submarine stationed at a place in the sea is sending out SONAR signals at a frequency of 1 kHz. SONAR waves travel at a speed of 5300 kmh^-1. An enemy submarine is moving towards the Indian submarine with a speed of 100 kmh^-1. The frequency of SONAR waves after getting reflected by the enemy submarine is

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1.04 kHz

1.02 kHz

1 kHz

0.98 kHz

answer is A.

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