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# A particle moving in a straight line covers half the distance with a speed of 3 ms−1. The other half of the distance is covered in two equal time intervals with speeds of 4.5 ms−1 and 7.5 ms−1, respectively. Find the average speed of the particle during this motion.

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#### VavgTDTT=xx2×3+x429+x4215=116+136+130=130+5+6180=18039=4.61m/s

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