Il.A TV tower stands vertically on a bankof a canal. F.om a point on the otherbank dire dy opposite the tower, theangle of elevation of the top of thetower is 60°. From another point 20 maway from this point on the line joingthis point to the foot of the tower, theangle of elevation of the top of thetower is 30° (see Fig. 9.12). Find tl cheight of the tower and the wid: ofthe canal.30°60←20m--mm-ナCFig. 9.12

Il.A TV tower stands vertically on a bankof a canal. F.om a point on t

1.	Il.A TV tower stands vertically on a bankof a canal. F.om a point on the otherbank dire dy opposite the tower, theangle of elevation of the top of thetower is 60°. From another point 20 maway from this point on the line joingthis point to the foot of the tower, theangle of elevation of the top of thetower is 30° (see Fig. 9.12). Find tl cheight of the tower and the wid: ofthe canal.30°60←20m--mm-ナCFig. 9.12
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