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A fireman 50m away fro a burning building directs a stream of water from a firehouse at an angle `30^(@)` above the horizontal. If the velocity of the stream is 40m/s. at what height will the strea of water strike the building ? `(g=9.8m//s^(2))`

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Correct Answer - 18.65m
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`h=x tan theta-(gx^(2))/(2u^(@)cos^(2)theta)`

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