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MHT CET Physics question

PhysicsWavesMHT CET

Two aeroplanes A and B, each moving with a speed of 720 km/hour, are moving directly away from each other. Aeroplane A emits a whistle of frequency 1080 Hz. The apparent frequency heard by a person in plane B will be (velocity of sound in air = 340 m/s)

Answer: (C)

Solution

Speeds are 200 m/s each, so \frac{340-200}{340+200}\frac${14

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Question ID VK-070126