$\displaystyle \text{A ball is thrown with a velocity of 30m/s at an angle }\theta$

$\displaystyle \text{ with the horizontal from a point }O.$

$\displaystyle \text{The ball was caught at a height of 1 m above the ground at point }P.$

$\displaystyle \text{If }\tan\theta =\tfrac{4}{3}\text{, what is the time took for the ball to go from }O\text{ to }P?$

$\displaystyle \text{What is the displacement of the ball at }P?$

$\displaystyle \text{Answers in book: }\:0.447\text{ sec, }\:1.28\text{ m.}$

.??