Step 1: Overview of Development Indicators
The development of a country is measured through various indicators, including economic, social, and health-related factors. These indicators help assess the overall well-being of a country's population.
Step 2: Why All the Factors Matter
- (A) Per capita income: Per capita income reflects the economic prosperity of a country and is often used to measure the standard of living.
- (B) Average literacy level: Literacy is an important social indicator, as it directly impacts the workforce's skills and overall development.
- (C) Health situation: A country's health situation is also crucial, as it influences productivity, life expectancy, and the quality of life.
Thus, the development of a country is determined by a combination of all these factors, making option (D) the correct answer.
$PQ$ is a chord of length $4\ \text{cm}$ of a circle of radius $2.5\ \text{cm}$. The tangents at $P$ and $Q$ intersect at a point $T$. Find the length of $TP$.