A TV tower has a height of 100 m. What is the maximum distance up to which the TV transmission can be received `(R = 8 xx 10^(6) m)`

Options

A. ` 34.77 km `
B. ` 32. 70 km `
C. ` 40 km `
D. ` 40 .70 km `

Answer

C

Explanation

Maximum distance d `= sqrt(2hR)`
` " " = sqrt(2xx 100 xx 8 xx 10 ^(6))`
` " " = 40 xx 10^(3) m `
` " " = 40 km `