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Theory of Structures - Engineering

Q1:

For beams breadth is constant,

A depth d ∝ M

B
depth d ∝ M

C
depth d ∝ 3 M

D
depth d ∝

ANS:B -

depth d ∝ M

M = bending stress x Section Modulus.

So, M is proportional to b when d is constant,
and M is proportional to underoot d when b is constant.