How much force is required to remove the stopper

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A large holding tank has an 8-in-diameter drain hole on the bottom horizontal surface of the tank. A stopper is lightly placed to cover the hole and a cable is attached to that stopper. When the tank needs to be drained, a person on a walkway over the tank is to pull on that cable. If the tank is filled to a depth of 3 0 ft with sea water, and the walkway is 8 ft above the fluid surface, how much force is required to remove the stopper?

Reference no: EM131172970

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