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A man throws balls with same speed verti...

A man throws balls with same speed vertically upwards one after the other at an interval of 3s. What should be the speed of throw so that more than two balls are in the sky at any time?

A

Only with speed 29.4 m/s

B

More than 29.4 m/s

C

At least 9.8 m/s

D

Any speed less than 29.4 m/s

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