A train is moving on a track at \( 30 \mathrm{~ms}^{-1} \). A ball is thrown from it perpendicul...

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A train is moving on a track at \( 30 \mathrm{~ms}^{-1} \). A ball is thrown from it perpendicular to the direction of motion with \( 30 \mathrm{~ms}^{-1} \) at \( 45^{\circ} \) from horizontal. Find the distance of ball from the point of projection on train to the point where it strikes the ground.
(a) \( 90 \mathrm{~m} \)
(b) \( 90 \sqrt{3} \mathrm{~m} \)
(c) \( 60 \mathrm{~m} \)
(d) \( 60 \sqrt{3} \mathrm{~m} \)
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