Question

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 = 6.4 x 106 m)

• A. 3258 km2
• B. 4180 km2
• C. 2510 km2
• D. 1525 km2

Answer 1

Answer: (A)

3258 km2

Answer 2

: Service area it can cover , $A = \pi d^{2}$

$A = \pi(2hR) = \frac{22}{7} \times 81 \times 6.4 \times 10^{6}m^{2} = 3258km^{2}$