Answer Posted / pubba

stress is the resisting force(R) developed per unit area(A)
inside any member when it is subjected to external force(F).
So,
stress=resisting force(R)/cross-sectional area of the
member(A)

But Pressure is the applied force(F)acting up on unit
area(A) of any member.
So,
Pressure=Applied force(F)/unit area(A).

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