A TV tower stands vertically on a bankof a canal. Fiom 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 eheight of the tower and the wid ofthe canal.11.

A TV tower stands vertically on a bankof a canal. Fiom a point on the

1.	A TV tower stands vertically on a bankof a canal. Fiom 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 eheight of the tower and the wid ofthe canal.11.
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