A steel plate d × b is sandwiched rigidly between two timber joists each D × B/2 in section. The steel will be (where Young’s modulus of steel is m times that of the timber).

A steel plate d × b is sandwiched rigidly between two timber joists e

1.	A steel plate d × b is sandwiched rigidly between two timber joists each D × B/2 in section. The steel will be (where Young’s modulus of steel is m times that of the timber).
A.	D² + mbd²)/6D]
B.	D³ + mbd³)/6D]
C.	D² + mbd³)/4D]
D.	D² + mbd²)/4D]
Answer» C. D² + mbd³)/4D]

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A steel plate d × b is sandwiched rigidly between two timber joists each D × B/2 in section. The steel will be (where Young’s modulus of steel is m times that of the timber).

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