The bridge opening pictured below is 20 m wide and the road is 10 m from the top of the water. The stones at the vertex of the opening are 0.5 m thick.
If the water level were to raise by 1.5 metres, how wide would the bridge opening be at the level of the water?
If the water level were to raise by 1.5 metres, how wide would the bridge opening be at the level of the water?
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