A television tower of height 140 m can broadcast its signal upto a maximum area of (Radius of earth `=6.4xx10^(6)m`)

Options

A. A) `1.56xx10^(6)km^(2)`
B. `B) 5.6xx10^(3)km^(2)`
C. `C) 5.6xx10^(10)km^(2)`
D. `D) 1.56xx10^(9)km^(2)`

Answer

B

Explanation

For TV signals, area covered
`=2piRH=2xxpixx64xx10^(6)xx140`
`=5.6xx10^(9)m^(2)=5.6xx10^(3)km^(2)`