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Bullets are fixed at regular intervals ...

Bullets are fixed at regular intervals of 10 second from a car moving with a speed of ` 30 ms^(-1)` towards another car approaching with a speed of 60 m/s . The interval at which the firing can be reported is (Speed of sound = `330 ms^(-1)`

A

7.5 s

B

8.32 s

C

6.7 s

D

12 s

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The correct Answer is:
A
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