1.

A particle moving in a straight line covers half the distance with speed of 3 m/s. The other half of the distance covered in two equal time intervals with speed of 4.5 m/s and 7.5 m/s respectively. The average speed of the particle during this motion is :-

Answer»

4.0 m/s
5.0 m/s
5.5 m/s
4.8 m/s

Answer :A


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