By what percentage will the transmission range of a TV tower be affected when the height of the tower is increased by $21\%$? (1) $15\%$ (2) $12\%$ (3) $10\%$ (4) $14\%$
By what percentage will the transmission range of a TV tower be affected when the height of the tower is increased by $21\%$?\\
(1) $15\%$\\
(2) $12\%$\\
(3) $10\%$\\
(4) $14\%$