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2 cars a&b approach each other with same velocity 20m/s. Man in car a fires bullets at intervals of 10s.What will be time interval b/w sounds of 2 bullets heard by man in car B?

2 cars a&b approach each other with same velocity 20m/s. Man in car a fires bullets at intervals of 10s.What will be time interval b/w sounds of 2 bullets heard by man in car B?

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