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The coordinates of a particle moving in ...

The coordinates of a particle moving in XY-plane at any instant of time t are `x=4t^(2),y=3t^(2)`. The speed of the particle at that instant is

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23
`v_(x)=(dx)/(dt)=8t, v_(y)=(dy)/(dt)=6t " Speed" v=sqrt(v_(x)^(2)+v_(y)^(2))=sqrt((8t)^(2)+(6t)^(2))=10t`
At t=3s, v=30m/s.
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