Step 1: Analyze the relationship.
The woman says, "His wife is the only daughter of my father."
This means the wife of the man is the woman's sister. Therefore, the man is married to the woman's sister and is her husband.
Final Answer: \[ \boxed{\text{Husband}} \]
A weight of $500\,$N is held on a smooth plane inclined at $30^\circ$ to the horizontal by a force $P$ acting at $30^\circ$ to the inclined plane as shown. Then the value of force $P$ is:
A steel wire of $20$ mm diameter is bent into a circular shape of $10$ m radius. If modulus of elasticity of wire is $2\times10^{5}\ \text{N/mm}^2$, then the maximum bending stress induced in wire is: