A man in a car is moving away from a hil (180 meters high), take 90 seconds to change angle of elevation of the top of the hil from 45° to 60°.The speed of the car is:

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A man in a car is moving away from a hil (180 meters high), take 90 seconds to change angle of elevation of the top of the hil from 45° to 60°.The speed of the car is:






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