What weight can it bear before being broken

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A concrete sidewalk slab is 17.5 MPa, 4 inches deep, and 2 m long.  A tree root has pushed it up so there is a 1 inch lip at the junction with the adjacent slab, and the slab is effectively 1 inch above its base underneath.  What weight can it bear before being broken?  If you grind the 1 inch off, making the slab 3 inches deep, what is the reduction in wieght it can bear?

Reference no: EM13534543

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