NTA Abhyas JEE Main2020PhysicsCommunication SystemPractice
A TV tower has a height of 150 m . The area of the region covered by the TV broadcast is (radius of earth = 6.4 × 10 6 m )
Options
- A9.6 π × 10 8 k m 2
- B19.2 π × 10 8 k m 2
- C19.2 π × 10 7 k m 2
- D1.92 π × 10 3 k m 2
Correct answer
D. 1.92 π × 10 3 k m 2
Step-by-step solution
Area of region covered = π d 2 = π ( 2 h R ) = π × 2 × 150 × 6.4 × 10 6 = 1.92 π × 10 9 m 2 = 1.92 π × 10 3 k m 2