Question

The area of the region covered by the TV broadcast by a TV tower of 100 m height is (Radius of the earth = 6.4 × 10⁶ m):

Options

• 1.28 π × 10³ km²

• 2 π × 10⁴ km²

• 3.1 × 10⁴ km²

• 6 π × 10⁴ km²

Answer 1

1.28 π × 10³ km²

Explanation:

Area covered by TV signals

A = 2πhR = 2 × 3.14 × 100 × 6.4 × 10⁶

= 128 π × 10⁸

⇒ A = 1.28 π × 10³ km²