yo . a body covers half the distance with a speed of 20m /s. and the other half with a speed of 30m / s average velocity of the body during whole journey is ?
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Distance = x
Time taken = ( x/20/20 ) + ( x/2/30 )
= x/40 + x/60
= ( 3x/120 + 2x/120 ) seconds
= 5x/120 seconds
Speed = D/T
= x/5x/120
1 Meter = 5/120
= 120/5
= 24m/s
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