Question

Please help me to solve this question..
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Answer 1

Answer:

Explanation:

CONSTANT SPEED FROM 3 SEC TO 7 SEC = 4 SECONDS.

VARIABLE SPEED (1) FROM 0 SE C TO 3 SEC= 3 SEC

                              (2) FROM  7 SEC TO 9 SEC =  2 SEC

                                                                            ----------------

                                                                               = 5 SEC.

HOPE THIS HELPS.