A particle moves on a straight line in such way that it covers 1st half distance with speed

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A particle moves on a straight line in such way that it covers 1st half distance with speed 3m`//`s and no half distance in 2 equal time intervals with speeds 4.5 m/s and 7.5 m`//`s respectively. Find average speed of the particle.
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can anyone tell me that jb b to c likha to 4.5t 7.5t and jb a to c only s/2 likha t kyu nhi likha uske sath

Sanjay-nfpr
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Sir aapne video ke aakhir ma bola ki ya 4m/s hamari average velocity ha par questioj ma to average speed bolatha na aapne sayath galti sa last ma bol diya average velocity

Meenajifan
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First of all its speed not velocity...

pankajapanchal