The coordinates of a moving particle at any time are given by $x = a{t^2}$ and $y = b{t^2}$. The speed of the particle at any moment is
The coordinates of a moving particle at any time are given by $x = a{t^2}$ and $y = b{t^2}$. The speed of the particle at any moment is
- A
$2t(a + b)$
- B
$2t\sqrt {({a^2} - {b^2})} $
- C
$t\,\sqrt {{a^2} + {b^2}} $
- D
$2t\sqrt {({a^2} + {b^2})} $
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