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A hill is 500 m hight. Supplies are to ...

A hill is ` 500 m` hight. Supplies are to be across the hill using a canon that can hurl packetets at a speed of `125 m//s` pver the hill . The canon is located at a distance of ` 800 m` from the foot to hill and can be veoved on the ground at a speed of ` 2 m//s , so that its distance from the hill can be adjusted. What is the shortest time inwhich a pachet can reach on the ground across the hill ? Taje ` g= 10 m//s^2`.

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