An underground tunnel is designed in the shape of a parabolic arch. The maximum height of the tunnel at its center is 9 meters. A horizontal steel beam, used to support electrical wiring for the trains, is installed 2 meters below the top of the tunnel. The beam stretches 12 meters across, from one side of the tunnel wall to the other. A high-speed train must pass through the tunnel, and engineers need to ensure there’s enough clearance for safety and ventilation. What is the total width of the tunnel at ground level, where the train enters and exits?

Question

BrainlyPeach · Answer

Approximately 25.46 meters wide at ground level.

Answer (1)

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