Step 1: Understanding the book
Gulamgiri is a famous work by Jyotirao Phule, an Indian social reformer. The book addresses the issue of untouchability and the social discrimination faced by the lower castes in India.
Step 2: Context of the book
In Gulamgiri, Phule talks about the oppressive social structures in Indian society and advocates for the abolition of untouchability. His work was part of a broader movement for social reform and the upliftment of the marginalized classes.
Step 3: Other options explanation
- (A) Caste System: While the book critiques the caste system, it specifically focuses on untouchability.
- (B) Communalism: The book does not address communalism but focuses on social discrimination and untouchability.
- (D) Child Marriage: Although Phule worked on issues related to social reform, Gulamgiri is not about child marriage.
Step 4: Conclusion
Thus, the correct answer is:
\[
\boxed{\text{Untouchability}}
\]
Find the unknown frequency if 24 is the median of the following frequency distribution:
\[\begin{array}{|c|c|c|c|c|c|} \hline \text{Class-interval} & 0-10 & 10-20 & 20-30 & 30-40 & 40-50 \\ \hline \text{Frequency} & 5 & 25 & 25 & \text{$p$} & 7 \\ \hline \end{array}\]
Two concentric circles are of radii $8\ \text{cm}$ and $5\ \text{cm}$. Find the length of the chord of the larger circle which touches (is tangent to) the smaller circle.