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In the given figure, a rocket is fired v...

In the given figure, a rocket is fired vertically upwards from its launching pad P. It first rises 40 km vertically upwards and then 40 km at 60° to the vertical. PA represents the first stage of the journey and AB the second. C is a point vertically below B on the horizontal level as P, calculate :

(i) the height of the rocket when it is at point B.

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The correct Answer is:
60 km
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