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For VHF signal broadcasting, ______ km2 of maximum service area will be covered by an antenna tower of height 30 m, if the receiving antenna is placed at ground. Let radius of the earth be 6400 km. (Round off to the Nearest Integer) (Take π as 3.14)

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answer is 1206.

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Detailed Solution

Radius of the zone that can cover by an antenna of height h is r=2hRr=2×30×6400×103 r2=60×6400×103m2⇒r2=60×6400×103m2 Now the area covered by the antenna =πr2⇒Area=(3.14)60×6400×103=1205760×103m2 =1205.7(km)2 ≈1206(km)2

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For VHF signal broadcasting, ______ km2 of maximum service area will be covered by an antenna tower of height 30 m, if the receiving antenna is placed at ground. Let radius of the earth be 6400 km. (Round off to the Nearest Integer) (Take π as 3.14)