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An aeroplane flying with uniform speed horizontally 1 km above the ground is observed at an elevation of 60∘ from a point on the ground. After 10 seconds, if the elevation is observed to be 30∘, then the speed of the plane (in km/hr) is |
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Answer» An aeroplane flying with uniform speed horizontally 1 km above the ground is observed at an elevation of 60∘ from a point on the ground. After 10 seconds, if the elevation is observed to be 30∘, then the speed of the plane (in km/hr) is |
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