Question
Question: A T.V. tower has a height of 150 m. The area of the region covered, the T.V. broadcast is (radius of...
A T.V. tower has a height of 150 m. The area of the region covered, the T.V. broadcast is (radius of earth = 6.4 × 106 m)
A
9.6 p × 108 m2
B
19.2p × 108 m2
C
19.2 p × 107 m2
D
1.92p × 103 km2
Answer
19.2p × 108 m2
Explanation
Solution
Area of the region covered for broadcasting
= pd2 = p(2hR)
= p × 2 × 150 × 6.4 × 106
= p × 300 × 6.4 × 106
= 19.2 × p × 108 m2