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# A body of mass m moving along a straight line covers half the distance with a speed of 2ms−1. The remaining half of distance is covered in two equal time intervals with a speed of 3ms−1 and 5ms−1 respectively. The average speed of the particle for the entire journey is?38ms−183ms−143ms−1163ms−1

A
163ms1
B
38ms1
C
43ms1
D
83ms1
Solution
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#### Let total distance be 2xX is traveled by 2 m/s and x/2 by 3m/s and remaining x/2 by 5 m/s.Vavg.=Total distanceTotal timeVavg.=2xx2+x6+x10Vavg.=2.608m/s

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