Let a steel bar of length 'l', breadth '...

Let a steel bar of length `'l',` breadth 'b' and depth 'd' be loaded at the centre by a load 'W'. Then the sag of bending of beam is (Y=Young's modulus of material of steel)

`(Wl^3)/(2bd^3Y)`

`(Wl^3)/(4bd^3 Y)`

`(Wl^3)/(2bd^3Y)`

`(Wl^3)/(4bd^2Y)`

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