Question

A T.V. tower has a height of 100 m. How much population is covered by T.V. broadcast, if the average population density around the tower is 1000/ km²?

• A. 39.5 × 10⁵
• B. 19.5 × 10⁶
• C. 29.5 × 10⁷
• D. 9 × 10⁴

Answer 1

Answer: (A)

39.5 × 10⁵

Answer 2

d = $\sqrt{2Rh}$

N = pd² s

= 2pRh s

= 2 × 3.14 × 6400 × 0.1 × 1000

= 2 × 3.14 × 6.4 × 10⁵

= 39.5 × 10⁵