Step 1: Context of the Great Depression (1929)
The Great Depression, which began in 1929, was the worst economic downturn in modern history. It originated in the United States and soon spread globally.
Step 2: Role of agricultural overproduction
In the 1920s, agricultural production increased rapidly due to technological advances and expanded farming. However, demand for agricultural goods did not increase at the same rate.
Step 3: Consequences
- This led to excess production of crops.
- Prices of agricultural goods fell sharply.
- Farmers could not repay debts, leading to a chain reaction affecting banks and industries.
Step 4: Conclusion
Thus, the first and major cause of the economic depression was excess production of agriculture.
\[
\boxed{\text{Excess production of agriculture}}
\]
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.