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A helium balloon leaves the ground at a point A and rises vertically............what is the speed of the balloon in m/s?

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A helium balloon leaves the ground at a point A and rises vertically at uniform speed.
At the end of 5 minutes, Rohan finds the angular elevation of the balloon as 30 degree.
If the point at which Rohan is standing is 550 m away from point A, what is the speed of the balloon in m/s?

posted Oct 4, 2019 by Samardeep Acharya

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