A TV transmitting antenna is 81 m tall. How much service area it can cover if the receiving antenna is at the ground level? (Radius of earth=`6.4xx10^
A TV transmitting antenna is 81 m tall. How much service area it can cover if the receiving antenna is at the ground level? (Radius of earth=`6.4xx10^(6)m`)
A. `3258km^(2)`
B. `4180km^(2)`
C. `2510km^(2)`
D. `1525km^(2)`
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Correct Answer - A
Service area it can cover, `A=pid^(2)`
`A=pi(2hR)=(22)/(7)xx2xx81xx6.4xx10^(6)m^(2)=3258km^(2)`
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