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[" 18.A bridge is in the shape of a semi...

[" 18.A bridge is in the shape of a semiellipse.It is "400" meters bran an "1" naximum heightorio "],[" metres at the middle points.The height of the brilge metapoint distant distant distant distant distant distant distant distantan handrentia "],[[" a) "2" metres "," b) "8" meres ",," b) "8" meres "]]

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