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                                    Four balls are dropped from the top of a tower at intervals of one second. The first ball reaches the ground after four seconds of dropping. What are the distances between first and second, second and third, third and fourth balls at this instant? | 
                            
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Answer»  Four balls are dropped from the top of a tower at intervals of one second. The first ball reaches the ground after four seconds of dropping. What are the distances between first and second, second and third, third and fourth balls at this instant?  | 
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