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The percentage, by which the transmission range of a T.V. tower, would be affected, when the height of the tower is increased by 21% is (nearly). 

(1) 10% 

(2) 11.5% 

(3) 21% 

(4) 42%

1 Answer

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Best answer

Correct option: (1) 10%

Explanation: 

Original transmission range,

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