A ball thrown down the incline strikes at a point on the incline \( 25 \mathrm{~m} \) below the ...

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A ball thrown down the incline strikes at a point on the incline \( 25 \mathrm{~m} \) below the horizontal as shown in the figure. If the ball rises to a maximum height of \( 20 \mathrm{~m} \) above the point of projection, the angle of projection \( \alpha \) (with horizontal \( x \)-axis) is
(a) \( \tan ^{-1} \frac{4}{3} \)
(b) \( \tan ^{-1} \frac{3}{4} \)
(c) \( \tan ^{-1} \frac{3}{2} \)
(d) \( \tan ^{-1} \frac{2}{3} \)
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