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water is retained in a 0.8 metres wide rectangular section channel by a sluice gate which is 1.3 metres high and can pivot about its

water is retained in a 0.8 metres wide rectangular section channel by a sluice gate which is 1.3 metres high and can pivot about its base, as shown in the figure below. Determine the tension in the horizontal retaining cable attached to the top of the gate when the depth of water is 1.1 metres. The density of water is 1020kg / m3.

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