A train moves towards a stationary observer with speed 34m/s. The train sounds a whistle and its frequency registered by the observer is f1. If the train s speed is reduced to 17m/s, the frequency registered is f2. If the speed of sound is 340m/s, then the ratio f1/f2 is?

A train moves towards a stationary observer with speed 34m/s. The trai

1.	A train moves towards a stationary observer with speed 34m/s. The train sounds a whistle and its frequency registered by the observer is f₁. If the train s speed is reduced to 17m/s, the frequency registered is f₂. If the speed of sound is 340m/s, then the ratio f₁/f₂ is?
A.	18/19
B.	1/2
C.	2
D.	19/18
Answer» E.

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A train moves towards a stationary observer with speed 34m/s. The train sounds a whistle and its frequency registered by the observer is f1. If the train s speed is reduced to 17m/s, the frequency registered is f2. If the speed of sound is 340m/s, then the ratio f1/f2 is?

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A train moves towards a stationary observer with speed 34m/s. The train sounds a whistle and its frequency registered by the observer is f₁. If the train s speed is reduced to 17m/s, the frequency registered is f₂. If the speed of sound is 340m/s, then the ratio f₁/f₂ is?